Question 584668
For $3.80 a grocer buys a case of fruit which contains 12 dozen. 
he knows that two dozen will spoil before he sells them.
 At what price per dozen must he sell the good ones to gain half of the whole cost?
:
{{{1/2}}}*3.80 = $1.90 is the profit he wants from this 
then
3.80 + 1.90 = $5.70; the revenue required from the 10 unspoiled dozen
:
{{{5.70/10}}} = 57 cents a dozen to realize a profit of $1.90