The advertisement shows the cost of buying staplers from a store.
- Mary bought 24 staplers. How much did she pay?
- Fabian bought 100 staplers. How much did he pay?
(a)
Number of sets of 15 staplers
= 24 ÷ 15
= 1 r 9
Cost of first 15 staplers
= 15 x 1.50
= $22.50
Cost of the next 9 staplers
= 9 x 1.30
= $11.70
Amount that Mary paid
= 22.50 + 11.70
= $34.20
(b)
Number of staplers that was not part of the first 15 staplers
= 100 - 15
= 85
Cost of first 15 staplers = $22.50
Cost of the next 85 staplers
= 85 x 1.30
= $110.50
Total cost of 100 staplers before an additional discount of 7% is applied
= 22.50 + 110.50
= $133
Amount that Fabian paid in percent after an additional discount of 7% is applied
= 100% - 7%
= 93%
100% of the total cost of 100 staplers = 133
1% of the total cost of 100 staplers = 133 ÷ 100 = 1.33
93% of the total cost of 100 staplers = 93 x 1.33 = 123.69
Amount that Fabian paid = $123.69
Answer(s): (a) $34.20; (b) $123.69