I got 4.54 EPA

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Server ("cli") reported: "SyntaxError: Expected "-", "[", "\\", "\\begin", "\\begin{", "]", "^", "_", "{", "}", [ \t\n\r], [%$], [().], [,:;?!'], [/|], [0-9], [><~], [\-+*=], or [a-zA-Z] but "\"" found.in 1:39"): {\displaystyle <semantics><mrow class="MJX-TeXAtom-ORD"><mfrac data-semantic-type="fraction" data-semantic-role="division" data-semantic-id="60" data-semantic-children="52,58"><mstyle displaystyle="true" scriptlevel="0"><mrow class="MJX-TeXAtom-ORD" data-semantic-type="infixop" data-semantic-role="subtraction" data-semantic-id="52" data-semantic-children="50,36" data-semantic-content="35" data-semantic-parent="60"><mrow data-semantic-type="infixop" data-semantic-role="addition" data-semantic-id="50" data-semantic-children="48,51,34" data-semantic-content="17,33" data-semantic-parent="52"><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="48" data-semantic-children="42,49" data-semantic-content="13" data-semantic-parent="50"><mrow data-semantic-type="fenced" data-semantic-role="leftright" data-semantic-id="42" data-semantic-children="39" data-semantic-content="0,12" data-semantic-parent="48"><mo stretchy="false" data-semantic-type="fence" data-semantic-role="open" data-semantic-id="0" data-semantic-parent="42" data-semantic-operator="fenced">(</mo><mrow data-semantic-type="infixop" data-semantic-role="addition" data-semantic-id="39" data-semantic-children="37,40" data-semantic-content="6" data-semantic-parent="42"><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="37" data-semantic-children="1,38" data-semantic-content="2" data-semantic-parent="39"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="1" data-semantic-parent="37">4</mn><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="2" data-semantic-parent="37" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mrow data-semantic-type="infixop" data-semantic-role="division" data-semantic-id="38" data-semantic-children="3,5" data-semantic-content="4" data-semantic-parent="37"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="3" data-semantic-parent="38">85</mn><mrow class="MJX-TeXAtom-ORD"><mo data-semantic-type="operator" data-semantic-role="division" data-semantic-id="4" data-semantic-parent="38" data-semantic-operator="infixop,/">/</mo></mrow><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="5" data-semantic-parent="38">100</mn></mrow></mrow><mo data-semantic-type="operator" data-semantic-role="addition" data-semantic-id="6" data-semantic-parent="39" data-semantic-operator="infixop,+">+</mo><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="40" data-semantic-children="7,41" data-semantic-content="8" data-semantic-parent="39"><mn data-semantic-type="number" data-semantic-role="float" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="7" data-semantic-parent="40">62.5</mn><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="8" data-semantic-parent="40" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mrow data-semantic-type="infixop" data-semantic-role="division" data-semantic-id="41" data-semantic-children="9,11" data-semantic-content="10" data-semantic-parent="40"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="9" data-semantic-parent="41">15</mn><mrow class="MJX-TeXAtom-ORD"><mo data-semantic-type="operator" data-semantic-role="division" data-semantic-id="10" data-semantic-parent="41" data-semantic-operator="infixop,/">/</mo></mrow><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="11" data-semantic-parent="41">100</mn></mrow></mrow></mrow><mo stretchy="false" data-semantic-type="fence" data-semantic-role="close" data-semantic-id="12" data-semantic-parent="42" data-semantic-operator="fenced">)</mo></mrow><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="13" data-semantic-parent="48" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mrow data-semantic-type="infixop" data-semantic-role="division" data-semantic-id="49" data-semantic-children="14,16" data-semantic-content="15" data-semantic-parent="48"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="14" data-semantic-parent="49">1</mn><mrow class="MJX-TeXAtom-ORD"><mo data-semantic-type="operator" data-semantic-role="division" data-semantic-id="15" data-semantic-parent="49" data-semantic-operator="infixop,/">/</mo></mrow><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="16" data-semantic-parent="49">2</mn></mrow></mrow><mo data-semantic-type="operator" data-semantic-role="addition" data-semantic-id="17" data-semantic-parent="50" data-semantic-operator="infixop,+">+</mo><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="51" data-semantic-children="47,30,32" data-semantic-content="29,31" data-semantic-parent="50"><mrow data-semantic-type="fenced" data-semantic-role="leftright" data-semantic-id="47" data-semantic-children="44" data-semantic-content="18,28" data-semantic-parent="51"><mo stretchy="false" data-semantic-type="fence" data-semantic-role="open" data-semantic-id="18" data-semantic-parent="47" data-semantic-operator="fenced">(</mo><mrow data-semantic-type="infixop" data-semantic-role="addition" data-semantic-id="44" data-semantic-children="43,45" data-semantic-content="22" data-semantic-parent="47"><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="43" data-semantic-children="19,21" data-semantic-content="20" data-semantic-parent="44"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="19" data-semantic-parent="43">6</mn><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="20" data-semantic-parent="43" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mn data-semantic-type="number" data-semantic-role="float" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="21" data-semantic-parent="43">0.15</mn></mrow><mo data-semantic-type="operator" data-semantic-role="addition" data-semantic-id="22" data-semantic-parent="44" data-semantic-operator="infixop,+">+</mo><mrow data-semantic-type="infixop" data-semantic-role="division" data-semantic-id="45" data-semantic-children="23,46" data-semantic-content="24" data-semantic-parent="44"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="23" data-semantic-parent="45">25</mn><mrow class="MJX-TeXAtom-ORD"><mo data-semantic-type="operator" data-semantic-role="division" data-semantic-id="24" data-semantic-parent="45" data-semantic-operator="infixop,/">/</mo></mrow><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="46" data-semantic-children="25,27" data-semantic-content="26" data-semantic-parent="45"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="25" data-semantic-parent="46">2</mn><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="26" data-semantic-parent="46" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mn data-semantic-type="number" data-semantic-role="float" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="27" data-semantic-parent="46">0.05</mn></mrow></mrow></mrow><mo stretchy="false" data-semantic-type="fence" data-semantic-role="close" data-semantic-id="28" data-semantic-parent="47" data-semantic-operator="fenced">)</mo></mrow><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="29" data-semantic-parent="51" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="30" data-semantic-parent="51">19</mn><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="31" data-semantic-parent="51" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="32" data-semantic-parent="51">5</mn></mrow><mo data-semantic-type="operator" data-semantic-role="addition" data-semantic-id="33" data-semantic-parent="50" data-semantic-operator="infixop,+">+</mo><mn data-semantic-type="number" data-semantic-role="float" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="34" data-semantic-parent="50">312.5</mn></mrow><mo data-semantic-type="operator" data-semantic-role="subtraction" data-semantic-id="35" data-semantic-parent="52" data-semantic-operator="infixop,−">−<!-- − --></mo><mn data-semantic-type="number" data-semantic-role="float" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="36" data-semantic-parent="52">0.3</mn></mrow></mstyle><mrow class="MJX-TeXAtom-ORD" data-semantic-type="infixop" data-semantic-role="addition" data-semantic-id="58" data-semantic-children="53,59" data-semantic-content="54" data-semantic-parent="60"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="53" data-semantic-parent="58">2</mn><mo data-semantic-type="operator" data-semantic-role="addition" data-semantic-id="54" data-semantic-parent="58" data-semantic-operator="infixop,+">+</mo><mrow data-semantic-type="infixop" data-semantic-role="multiplication" data-semantic-id="59" data-semantic-children="55,57" data-semantic-content="56" data-semantic-parent="58"><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="55" data-semantic-parent="59">20</mn><mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="56" data-semantic-parent="59" data-semantic-operator="infixop,∗">∗<!-- ∗ --></mo><mn data-semantic-type="number" data-semantic-role="integer" data-semantic-font="normal" data-semantic-annotation="clearspeak:simple" data-semantic-id="57" data-semantic-parent="59">5</mn></mrow></mrow></mfrac></mrow><annotation encoding="application/x-tex">{\displaystyle {(4*85/100+62.5*15/100)*1/2+(6*0.15+25/2*0.05)*19*5+312.5-0.3} \over {2+20*5}}</annotation></semantics>} <img src="/w/index.php?title=Special:MathShowImage&hash=a9464febc314c32d725fa0eda9d845f7&mode=mathml" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -2.005ex; height: 5.843ex; width: 82.59ex;" alt="{\displaystyle {(4*85/100+62.5*15/100)*1/2+(6*0.15+25/2*0.05)*19*5+312.5-0.3} \over {2+20*5}}"/>

I assumed Eyeless Skull chance of 5%, Rare Success on sale 15% as you suggested, and subtracted the <a href="/wiki/Piece_of_Rostygold" title="Piece of Rostygold"><img alt="" src="/w/images/thumb/5/50/Red_gold.png/20px-Red_gold.png" decoding="async" width="20" height="26" srcset="/w/images/thumb/5/50/Red_gold.png/30px-Red_gold.png 1.5x, /w/images/thumb/5/50/Red_gold.png/40px-Red_gold.png 2x" /></a> 10 x <a href="/wiki/Piece_of_Rostygold" title="Piece of Rostygold">Piece of Rostygold</a> from the total (Bazaar priced)