The advertisement shows the cost of buying markers from a shop.
- Penelope bought 23 markers. How much did she pay?
- Owen bought 70 markers. How much did he pay?
(a)
Number of sets of 15 markers
= 23 ÷ 15
= 1 r 8
Cost of first 15 markers
= 15 x 4.90
= $73.50
Cost of the next 8 markers
= 8 x 4.70
= $37.60
Amount that Penelope paid
= 73.50 + 37.60
= $111.10
(b)
Number of markers that was not part of the first 15 markers
= 70 - 15
= 55
Cost of first 15 markers = $73.50
Cost of the next 55 markers
= 55 x 4.70
= $258.50
Total cost of 70 markers before an additional discount of 5% is applied
= 73.50 + 258.50
= $332
Amount that Owen paid in percent after an additional discount of 5% is applied
= 100% - 5%
= 95%
100% of the total cost of 70 markers = 332
1% of the total cost of 70 markers = 332 ÷ 100 = 3.32
95% of the total cost of 70 markers = 95 x 3.32 = 315.40
Amount that Owen paid = $315.40
Answer(s): (a) $111.10; (b) $315.40
