The advertisement shows the cost of buying pens from a stationery kiosk.
- Elyse bought 28 pens. How much did she pay?
- Vincent bought 60 pens. How much did he pay?
(a)
Number of sets of 15 pens
= 28 ÷ 15
= 1 r 13
Cost of first 15 pens
= 15 x 4.30
= $64.50
Cost of the next 13 pens
= 13 x 4.10
= $53.30
Amount that Elyse paid
= 64.50 + 53.30
= $117.80
(b)
Number of pens that was not part of the first 15 pens
= 60 - 15
= 45
Cost of first 15 pens = $64.50
Cost of the next 45 pens
= 45 x 4.10
= $184.50
Total cost of 60 pens before an additional discount of 6% is applied
= 64.50 + 184.50
= $249
Amount that Vincent paid in percent after an additional discount of 6% is applied
= 100% - 6%
= 94%
100% of the total cost of 60 pens = 249
1% of the total cost of 60 pens = 249 ÷ 100 = 2.49
94% of the total cost of 60 pens = 94 x 2.49 = 234.06
Amount that Vincent paid = $234.06
Answer(s): (a) $117.80; (b) $234.06