Sales price is $81, gross profit is 170% of cost, what is the value of gross profit?	Choose the correct choice:
A) 32  B) 33  C) 39  D) 40  E) 51
Cost + Profit = Sales   Cost + (170/100)Cost = 81   Cost = 30   Profit = 81 - 30= 
<gadget id="calculator">81 - 30</gadget>
<output>51</output>
51   Answer (51)
<result>E</result>
Sales price is $81, gross profit is 170% of cost, what is the value of gross profit?