During her shopping trip, Anna bought three different types of crayons, L, M and N in the ratio of 6 : 2 : 7. She decided to sell them at the prices listed as shown.
Crayon L : $2.50
Crayon M : $0.90
Crayon N : $0.50
Given that Anna bought a total 405 crayons, how much did Anna collect from the sale of all the crayons?
|
Crayon L |
Crayon M |
Crayon N |
Total |
Ratio of crayon |
6 u |
2 u |
7 u |
15 u |
Value of each crayon |
$2.50 |
$0.90 |
$0.50 |
|
15 u = 405
1 u = 405 ÷ 15 = 27
Number of Crayon L
= 6 x 27
= 162
Number of Crayon M
= 2 x 27
= 54
Number of Crayon N
= 7 x 27
= 189
Total revenue
= 162 x 2.50 + 54 x 0.90 + 189 x 0.50
= 405.00 + 48.60 + 94.50
= $548.10
Answer(s): $548.10