The advertisement shows the cost of buying staplers from a stationery shop.
- Rachel bought 18 staplers. How much did she pay?
- Jeremy bought 70 staplers. How much did he pay?
(a)
Number of sets of 15 staplers
= 18 ÷ 15
= 1 r 3
Cost of first 15 staplers
= 15 x 2.10
= $31.50
Cost of the next 3 staplers
= 3 x 1.70
= $5.10
Amount that Rachel paid
= 31.50 + 5.10
= $36.60
(b)
Number of staplers that was not part of the first 15 staplers
= 70 - 15
= 55
Cost of first 15 staplers = $31.50
Cost of the next 55 staplers
= 55 x 1.70
= $93.50
Total cost of 70 staplers before an additional discount of 5% is applied
= 31.50 + 93.50
= $125
Amount that Jeremy paid in percent after an additional discount of 5% is applied
= 100% - 5%
= 95%
100% of the total cost of 70 staplers = 125
1% of the total cost of 70 staplers = 125 ÷ 100 = 1.25
95% of the total cost of 70 staplers = 95 x 1.25 = 118.75
Amount that Jeremy paid = $118.75
Answer(s): (a) $36.60; (b) $118.75
