The advertisement shows the cost of buying markers from a store.
- Mary bought 26 markers. How much did she pay?
- Reggie bought 70 markers. How much did he pay?
(a)
Number of sets of 15 markers
= 26 ÷ 15
= 1 r 11
Cost of first 15 markers
= 15 x 3.70
= $55.50
Cost of the next 11 markers
= 11 x 3.30
= $36.30
Amount that Mary paid
= 55.50 + 36.30
= $91.80
(b)
Number of markers that was not part of the first 15 markers
= 70 - 15
= 55
Cost of first 15 markers = $55.50
Cost of the next 55 markers
= 55 x 3.30
= $181.50
Total cost of 70 markers before an additional discount of 9% is applied
= 55.50 + 181.50
= $237
Amount that Reggie paid in percent after an additional discount of 9% is applied
= 100% - 9%
= 91%
100% of the total cost of 70 markers = 237
1% of the total cost of 70 markers = 237 ÷ 100 = 2.37
91% of the total cost of 70 markers = 91 x 2.37 = 215.67
Amount that Reggie paid = $215.67
Answer(s): (a) $91.80; (b) $215.67