表頭題目：上周市場X中的出納員的總工作小時數及其每小時的工資。

　　注：上周任何時候工作的出納員的人數都不會超過2人，每個出納員同一天工作都不超過12小時，且每天出納員的工作都是持續不斷的。

　　12.On Saturday of last week, Market X was open for 15 hours and exactly four cashiers worked.What was the greatest possible amount that the market could have paid in cashiers'wages for that day?

　　A.$132.00

　　B.$157.50

　　C.$161.25

　　D.$163.00

　　E.$165.00

　　答案：C

　　13.If Market X is open 96 hours per week, for how many hours last week were two cashiers working at the same time?

　　A.49

　　B.48

　　C.36

　　D.24

　　E.12

　　答案：A

　　14.If Cashier S's hourly wage were to increase by 10 percent and S's weekly hours were to decrease by 10 percent from last week's total hours, what would be the change, if any, in S's total weekly wage?

　　A.An increase of $1.3

　　B.An increase of $0.55

　　C.No change

　　D.A decrease of $0.55

　　E.A decrease of $1.37

　　答案：E