During her shopping trip, Yoko bought three different types of pens, A, B and C in the ratio of 4 : 3 : 9. She decided to sell them at the prices listed as shown.
Pen A : $2.40
Pen B : $0.85
Pen C : $0.30
Given that Yoko bought a total 416 pens, how much did Yoko collect from the sale of all the pens?
|
Pen A |
Pen B |
Pen C |
Total |
Ratio of pen |
4 u |
3 u |
9 u |
16 u |
Value of each pen |
$2.40 |
$0.85 |
$0.30 |
|
16 u = 416
1 u = 416 ÷ 16 = 26
Number of Pen A
= 4 x 26
= 104
Number of Pen B
= 3 x 26
= 78
Number of Pen C
= 9 x 26
= 234
Total revenue
= 104 x 2.40 + 78 x 0.85 + 234 x 0.30
= 249.60 + 66.30 + 70.20
= $386.10
Answer(s): $386.10