During her shopping trip, Sarah bought three different types of pencils, D, E and F in the ratio of 4 : 2 : 7. She decided to sell them at the prices listed as shown.
Pencil D : $2.40
Pencil E : $10
Pencil F : $0.50
Given that Sarah bought a total 481 pencils, how much did Sarah collect from the sale of all the pencils?
|
Pencil D |
Pencil E |
Pencil F |
Total |
Ratio of pencil |
4 u |
2 u |
7 u |
13 u |
Value of each pencil |
$2.40 |
$10 |
$0.50 |
|
13 u = 481
1 u = 481 ÷ 13 = 37
Number of Pencil D
= 4 x 37
= 148
Number of Pencil E
= 2 x 37
= 74
Number of Pencil F
= 7 x 37
= 259
Total revenue
= 148 x 2.40 + 74 x 10 + 259 x 0.50
= 355.20 + 740.00 + 129.50
= $1224.70
Answer(s): $1224.70