During her shopping trip, Erika bought three different types of pens, C, D and E in the ratio of 6 : 2 : 8. She decided to sell them at the prices listed as shown.
Pen C : $2.50
Pen D : $0.90
Pen E : $0.40
Given that Erika bought a total 432 pens, how much did Erika collect from the sale of all the pens?
|
Pen C |
Pen D |
Pen E |
Total |
Ratio of pen |
6 u |
2 u |
8 u |
16 u |
Value of each pen |
$2.50 |
$0.90 |
$0.40 |
|
16 u = 432
1 u = 432 ÷ 16 = 27
Number of Pen C
= 6 x 27
= 162
Number of Pen D
= 2 x 27
= 54
Number of Pen E
= 8 x 27
= 216
Total revenue
= 162 x 2.50 + 54 x 0.90 + 216 x 0.40
= 405.00 + 48.60 + 86.40
= $540.00
Answer(s): $540.00