The advertisement shows the cost of buying staplers from a book shop.
- Joelle bought 27 staplers. How much did she pay?
- Glen bought 100 staplers. How much did he pay?
(a)
Number of sets of 15 staplers
= 27 ÷ 15
= 1 r 12
Cost of first 15 staplers
= 15 x 3.70
= $55.50
Cost of the next 12 staplers
= 12 x 3.30
= $39.60
Amount that Joelle paid
= 55.50 + 39.60
= $95.10
(b)
Number of staplers that was not part of the first 15 staplers
= 100 - 15
= 85
Cost of first 15 staplers = $55.50
Cost of the next 85 staplers
= 85 x 3.30
= $280.50
Total cost of 100 staplers before an additional discount of 5% is applied
= 55.50 + 280.50
= $336
Amount that Glen paid in percent after an additional discount of 5% is applied
= 100% - 5%
= 95%
100% of the total cost of 100 staplers = 336
1% of the total cost of 100 staplers = 336 ÷ 100 = 3.36
95% of the total cost of 100 staplers = 95 x 3.36 = 319.20
Amount that Glen paid = $319.20
Answer(s): (a) $95.10; (b) $319.20