During her shopping trip, Diana bought three different types of crayons, A, B and C in the ratio of 5 : 2 : 7. She decided to sell them at the prices listed as shown.
Crayon A : $2.40
Crayon B : $0.90
Crayon C : $0.30
Given that Diana bought a total 490 crayons, how much did Diana collect from the sale of all the crayons?
|
Crayon A |
Crayon B |
Crayon C |
Total |
Ratio of crayon |
5 u |
2 u |
7 u |
14 u |
Value of each crayon |
$2.40 |
$0.90 |
$0.30 |
|
14 u = 490
1 u = 490 ÷ 14 = 35
Number of Crayon A
= 5 x 35
= 175
Number of Crayon B
= 2 x 35
= 70
Number of Crayon C
= 7 x 35
= 245
Total revenue
= 175 x 2.40 + 70 x 0.90 + 245 x 0.30
= 420.00 + 63.00 + 73.50
= $556.50
Answer(s): $556.50