During her shopping trip, Lucy bought three different types of crayons, S, T and U in the ratio of 5 : 2 : 7. She decided to sell them at the prices listed as shown.
Crayon S : $2.20
Crayon T : $0.90
Crayon U : $0.50
Given that Lucy bought a total 448 crayons, how much did Lucy collect from the sale of all the crayons?
|
Crayon S |
Crayon T |
Crayon U |
Total |
Ratio of crayon |
5 u |
2 u |
7 u |
14 u |
Value of each crayon |
$2.20 |
$0.90 |
$0.50 |
|
14 u = 448
1 u = 448 ÷ 14 = 32
Number of Crayon S
= 5 x 32
= 160
Number of Crayon T
= 2 x 32
= 64
Number of Crayon U
= 7 x 32
= 224
Total revenue
= 160 x 2.20 + 64 x 0.90 + 224 x 0.50
= 352.00 + 57.60 + 112.00
= $521.60
Answer(s): $521.60