Sales price is $91, gross profit is 160% of cost, what is the value of gross profit?	Choose the most appropriate option.
A) 32 B) 33 C) 39 D) 40 E) 56

Rationale: "cost + profit = sales cost + ( 160 / 100 ) cost = 91 cost = 35 profit = 91 - 35 = 56 answer ( e )"
Answer: E