Answer:
the least profitable is $39.66 per unit or 9.72 per minute
Explanation:
The computation is as follows:
For WX
The Price Per Unit is
= $355.20 - $259.22
= $95.98
And
Price per Minute is
= $95.98 ÷ 7.70
= 12.46
For KD
The Price Per Unit is
= $228.48 - $173.04
= $55.44
And,
Price Per Minute is
= $55.44 ÷ 4.50
= 12.32
For FS
The Price Per Unit is
= $199.23 - $159.57
= $39.66
And, Price Per Minute is
= $55.44 ÷ 5.70
= 9.72
Therefore here the least profitable is $39.66 per unit or 9.72 per minute
This is the answer but the same is not provided