The advertisement shows the cost of buying pencils from a stationery kiosk.
- Jane bought 23 pencils. How much did she pay?
- Albert bought 70 pencils. How much did he pay?
(a)
Number of sets of 15 pencils
= 23 ÷ 15
= 1 r 8
Cost of first 15 pencils
= 15 x 4.10
= $61.50
Cost of the next 8 pencils
= 8 x 3.70
= $29.60
Amount that Jane paid
= 61.50 + 29.60
= $91.10
(b)
Number of pencils that was not part of the first 15 pencils
= 70 - 15
= 55
Cost of first 15 pencils = $61.50
Cost of the next 55 pencils
= 55 x 3.70
= $203.50
Total cost of 70 pencils before an additional discount of 10% is applied
= 61.50 + 203.50
= $265
Amount that Albert paid in percent after an additional discount of 10% is applied
= 100% - 10%
= 90%
100% of the total cost of 70 pencils = 265
1% of the total cost of 70 pencils = 265 ÷ 100 = 2.65
90% of the total cost of 70 pencils = 90 x 2.65 = 238.50
Amount that Albert paid = $238.50
Answer(s): (a) $91.10; (b) $238.50