Karen's Compensation Is Based on Piecework

Karen's compensation is based on piecework. She is paid $0.67 for each order she fills for a manufacturer. A spreadsheet is used to calculate all the employees compensation. Cell B7 contains Karen's piece rate of pay and Cells C7 through G7 contain the number of orders Karen filled each day of the week. Which formula calculates Karen's gross pay for the week?

A) =B7*C7
B) =B7*C7*G7
C) =B7*SUM(C7:G7)
D) =B7/SUM(C7:G7)