A pen cost $2.50. A stapler cost $13.50 more than the pen. Gwen spent $156 on such pens and staplers. She bought four times as many pens as staplers.
- How many staplers did Gwen buy?
- How much money did Gwen spend on the pens?
|
Pens |
Staplers |
Total |
Number |
4 u |
1 u |
|
Value |
2.50 |
16 |
|
Total value |
10 u |
16 u |
156 |
(a)
Cost of a stapler
= 13.50 + 2.50
= $16
Total cost of pens and staplers
= 10 u + 16 u
= 26 u
26 u = 156
1 u = 156 ÷ 26 = 6
Number of staplers that Gwen bought
= 1 u
= 6
(b)
Amount that Gwen spent on pens
= 10 u
= 10 x 6
= $60
Answer(s): (a) 6; (b) $60