During her shopping trip, Cathy bought three different types of crayons, D, E and F in the ratio of 6 : 2 : 7. She decided to sell them at the prices listed as shown.
Crayon D : $1.60
Crayon E : $0.90
Crayon F : $0.50
Given that Cathy bought a total 540 crayons, how much did Cathy collect from the sale of all the crayons?
|
Crayon D |
Crayon E |
Crayon F |
Total |
Ratio of crayon |
6 u |
2 u |
7 u |
15 u |
Value of each crayon |
$1.60 |
$0.90 |
$0.50 |
|
15 u = 540
1 u = 540 ÷ 15 = 36
Number of Crayon D
= 6 x 36
= 216
Number of Crayon E
= 2 x 36
= 72
Number of Crayon F
= 7 x 36
= 252
Total revenue
= 216 x 1.60 + 72 x 0.90 + 252 x 0.50
= 345.60 + 64.80 + 126.00
= $536.40
Answer(s): $536.40