A file cost $2.50. A stapler cost $13.50 more than the file. Cathy spent $252 on such files and staplers. She bought twice as many files as staplers.
- How many staplers did Cathy buy?
- How much money did Cathy spend on the files?
|
Files |
Staplers |
Total |
Number |
2 u |
1 u |
|
Value |
2.50 |
16 |
|
Total value |
5 u |
16 u |
252 |
(a)
Cost of a stapler
= 13.50 + 2.50
= $16
Total cost of files and staplers
= 5 u + 16 u
= 21 u
21 u = 252
1 u = 252 ÷ 21 = 12
Number of staplers that Cathy bought
= 1 u
= 12
(b)
Amount that Cathy spent on files
= 5 u
= 5 x 12
= $60
Answer(s): (a) 12; (b) $60