A grocer buys apples for 100¢ per pound. If 20% of the apples goes bad and he still wants to make a 10% profit over his purchase price, what should be the sales price? Choose the most appropriate option:
A) 136¢
B) 130¢
C) 140¢
D) 137.5¢
E) 142¢
for making calculation simple let us consider he buys 10pounds @ 100/pound=1000¢ in total .   20% apples lost...means 8 pounds left.   further he wants 10% profit on 1000 ¢   means he wants to earn 1100¢   sales price should be   1100/8= 
<gadget id="calculator">  1100/8</gadget>
<output>275/2 = around 137.5</output>
¢ 137.5   Ans 137.5¢
<result>D</result>
A grocer buys apples for 100¢ per pound. If 20% of the apples goes bad and he still wants to make a 10% profit over his purchase price, what should be the sales price?