A case contains c cartons. Each carton contains b boxes, and each box contains 400 paper clips. How many paper clips are contained in 2 cases? Select
A) 400 bc B) 400 b / c C) 800 bc D) 800 b / c E) 800 / bc

Rationale: "2 cases * c cartons / case * b boxes / carton * 400 clips / box = 800 bc paper clips the answer is c ."
Answer: C