Answer:
Differential Analysis on January 25:
                    Make         Buy      Difference
                 Alternative 1  Alternative 2
Avoidable costs         $43        $39         $4
per unit of (100 bottles)
Explanation:
a) Data and Calculations:
Variable manufacturing cost per unit = $43 ($55 - $12)
Fixed manufacturing cost per unit = Â Â Â Â 12
Total manufacturing cost per unit = Â Â Â $55
Outside supplier's offered price per unit = $36
Freight per unit for outside supply = Â Â Â Â Â Â Â 3
Total outside supply cost per unit = Â Â Â Â Â Â $39
b) There is an additional avoidable cost of $4 per unit to make the bottles. Â From a financial point of view, it will be cost-effective to buy the bottles from the outside supplier. Â If the company finds an alternative use of the production facilities, the cost difference will increase.