During her shopping trip, Erika bought three different types of crayons, C, D and E in the ratio of 5 : 3 : 9. She decided to sell them at the prices listed as shown.
Crayon C : $2.70
Crayon D : $0.90
Crayon E : $0.40
Given that Erika bought a total 527 crayons, how much did Erika collect from the sale of all the crayons?
|
Crayon C |
Crayon D |
Crayon E |
Total |
Ratio of crayon |
5 u |
3 u |
9 u |
17 u |
Value of each crayon |
$2.70 |
$0.90 |
$0.40 |
|
17 u = 527
1 u = 527 ÷ 17 = 31
Number of Crayon C
= 5 x 31
= 155
Number of Crayon D
= 3 x 31
= 93
Number of Crayon E
= 9 x 31
= 279
Total revenue
= 155 x 2.70 + 93 x 0.90 + 279 x 0.40
= 418.50 + 83.70 + 111.60
= $613.80
Answer(s): $613.80