During her shopping trip, Fanny bought three different types of pencils, R, S and T in the ratio of 4 : 2 : 7. She decided to sell them at the prices listed as shown.
Pencil R : $1.80
Pencil S : $0.90
Pencil T : $0.50
Given that Fanny bought a total 507 pencils, how much did Fanny collect from the sale of all the pencils?
|
Pencil R |
Pencil S |
Pencil T |
Total |
Ratio of pencil |
4 u |
2 u |
7 u |
13 u |
Value of each pencil |
$1.80 |
$0.90 |
$0.50 |
|
13 u = 507
1 u = 507 ÷ 13 = 39
Number of Pencil R
= 4 x 39
= 156
Number of Pencil S
= 2 x 39
= 78
Number of Pencil T
= 7 x 39
= 273
Total revenue
= 156 x 1.80 + 78 x 0.90 + 273 x 0.50
= 280.80 + 70.20 + 136.50
= $487.50
Answer(s): $487.50