During her shopping trip, Emily bought three different types of crayons, A, B and C in the ratio of 5 : 3 : 7. She decided to sell them at the prices listed as shown.
Crayon A : $2.55
Crayon B : $0.70
Crayon C : $0.30
Given that Emily bought a total 450 crayons, how much did Emily collect from the sale of all the crayons?
|
Crayon A |
Crayon B |
Crayon C |
Total |
Ratio of crayon |
5 u |
3 u |
7 u |
15 u |
Value of each crayon |
$2.55 |
$0.70 |
$0.30 |
|
15 u = 450
1 u = 450 ÷ 15 = 30
Number of Crayon A
= 5 x 30
= 150
Number of Crayon B
= 3 x 30
= 90
Number of Crayon C
= 7 x 30
= 210
Total revenue
= 150 x 2.55 + 90 x 0.70 + 210 x 0.30
= 382.50 + 63.00 + 63.00
= $508.50
Answer(s): $508.50