a merchant marks his goods up by 30 % and then offers a discount of 20 % on the marked price. what % profit does the merchant make after the discount? Pick:
A) 8 %  B) 10 %  C) 21 %  D) 15 %  E) 4 %
<gadget id="calculator">30 + 100</gadget>
<output>130</output>

<gadget id="calculator">130 * 20</gadget>
<output>2_600</output>

<gadget id="calculator">2_600 / 100</gadget>
<output>26</output>

<gadget id="calculator">130 - 26</gadget>
<output>104</output>

<gadget id="calculator">104 - 100</gadget>
<output>4</output>

<result>E</result>
a merchant marks his goods up by 30 % and then offers a discount of 20 % on the marked price. what % profit does the merchant make after the discount?
subtract(subtract(add(30, const_100), divide(multiply(add(30, const_100), 20), const_100)), const_100)
"let the price be 100 . the price becomes 130 after a 30 % markup . now a discount of 20 % on 130 . profit = 104 - 100 4 % answer e"