A case contains C cartons. Each carton contains B boxes, and each box contains 200 paper clips. How many paper clips are contained in 2 cases? Options
A) 200 bc
B) 200 b / c
C) 400 bc
D) 400 b / c
E) 400 / bc

Rationale: "2 cases * c cartons / case * b boxes / carton * 200 clips / box = 400 bc paper clips the answer is c ."
Answer: C