The advertisement shows the cost of buying markers from a stationery kiosk.
- Wendy bought 29 markers. How much did she pay?
- Ryan bought 90 markers. How much did he pay?
(a)
Number of sets of 15 markers
= 29 ÷ 15
= 1 r 14
Cost of first 15 markers
= 15 x 3.90
= $58.50
Cost of the next 14 markers
= 14 x 3.70
= $51.80
Amount that Wendy paid
= 58.50 + 51.80
= $110.30
(b)
Number of markers that was not part of the first 15 markers
= 90 - 15
= 75
Cost of first 15 markers = $58.50
Cost of the next 75 markers
= 75 x 3.70
= $277.50
Total cost of 90 markers before an additional discount of 9% is applied
= 58.50 + 277.50
= $336
Amount that Ryan paid in percent after an additional discount of 9% is applied
= 100% - 9%
= 91%
100% of the total cost of 90 markers = 336
1% of the total cost of 90 markers = 336 ÷ 100 = 3.36
91% of the total cost of 90 markers = 91 x 3.36 = 305.76
Amount that Ryan paid = $305.76
Answer(s): (a) $110.30; (b) $305.76
