The advertisement shows the cost of buying staplers from a bookstore.
- Usha bought 23 staplers. How much did she pay?
- Fabian bought 70 staplers. How much did he pay?
(a)
Number of sets of 15 staplers
= 23 ÷ 15
= 1 r 8
Cost of first 15 staplers
= 15 x 2.50
= $37.50
Cost of the next 8 staplers
= 8 x 2.30
= $18.40
Amount that Usha paid
= 37.50 + 18.40
= $55.90
(b)
Number of staplers that was not part of the first 15 staplers
= 70 - 15
= 55
Cost of first 15 staplers = $37.50
Cost of the next 55 staplers
= 55 x 2.30
= $126.50
Total cost of 70 staplers before an additional discount of 3% is applied
= 37.50 + 126.50
= $164
Amount that Fabian paid in percent after an additional discount of 3% is applied
= 100% - 3%
= 97%
100% of the total cost of 70 staplers = 164
1% of the total cost of 70 staplers = 164 ÷ 100 = 1.64
97% of the total cost of 70 staplers = 97 x 1.64 = 159.08
Amount that Fabian paid = $159.08
Answer(s): (a) $55.90; (b) $159.08