The ink cost for each card coming from printer b is $0.30
How to calculate ink cost for printer B
- Total hours of machine running for all printers for 3 weeks = 40 + 50 + 45 + 45 + 50 + 40 + 55 + 30 + 60
= 415
- Total running hours of printer B = 50 + 50 + 30
= 130
- Total cards produced in 3 weeks = 7,950 + 7,800 + 9,600
= 25,350
let
- cards produced by printer b = x
Ratio of total hours to total cards = ratio of printer b hours to cards produced by printer b
415 : 25,350 = 130 : x
415 / 25,350 = 130 / x
415 × x = 25,350 × 130
415x = 3,295,500
x = 3,295,500 ÷ 415
= 7940.96385542168
Approximately,
x = 7941
Total cost of printer b in 130 hours = 130 × 15
= 1,950
Cost of ink = 1,950 / 7941
= 0.24556101246694
Approximately,
$0.30
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