12.If a notebook is 14.75, how much is the cost of 8 notebooks?
A.120.00
B.130.00
C.135.00
D.140.00

13.For thier fund-raising, a Grade 5 class sold packages of cookies at 11.75 a package. If they sold 210 packages, about how much did they get?
A.2,300.00
B.2,400.00
C.2,500.00
D.2,600.00

14.A working student earns 29.50 an hour, working 4 hours a day and 3 days a week. About how much does she earn a week?
A.320.00
B.330.00
C.350.00
D.360.00

15.A math book is 3.78 centimeters thick. Estimate how thick will 21 math books on a shelf be?
A.50 cm
B.60 cm
C.80 cm
D.90 cm​