During her shopping trip, Kathy bought three different types of pens, C, D and E in the ratio of 6 : 3 : 9. She decided to sell them at the prices listed as shown.
Pen C : $1.40
Pen D : $0.75
Pen E : $0.50
Given that Kathy bought a total 594 pens, how much did Kathy collect from the sale of all the pens?
|
Pen C |
Pen D |
Pen E |
Total |
Ratio of pen |
6 u |
3 u |
9 u |
18 u |
Value of each pen |
$1.40 |
$0.75 |
$0.50 |
|
18 u = 594
1 u = 594 ÷ 18 = 33
Number of Pen C
= 6 x 33
= 198
Number of Pen D
= 3 x 33
= 99
Number of Pen E
= 9 x 33
= 297
Total revenue
= 198 x 1.40 + 99 x 0.75 + 297 x 0.50
= 277.20 + 74.25 + 148.50
= $499.95
Answer(s): $499.95