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X Company currently buys a part from a supplier for $13.72 per unit but is consi

ID: 2575325 • Letter: X

Question

X Company currently buys a part from a supplier for $13.72 per unit but is considering making the part itself next year. This year, they purchased 3,300 units of this part; next year, they think they will need 3,800 units. Estimated costs to make the part are:


Of the estimated fixed overhead, $6,468 are common costs that would be allocated to the part; the rest would be additional fixed overhead costs. X Company currently rents unused factory space for $2,600; it will have to use this space to make the part. If X Company makes the part instead of buying it, it will save ?

I tried:

Per Unit

For 3,800 units

Direct material

$              3.74

$               14,212

Add: Direct Labor

$              4.88

$               18,544

Add: Variable overhead

$              2.60

$                 9,880

Add: Fixed overhead

$          3.7421

$               14,220

Total

$          14.962

$               56,856

Fixed overhead per unit = ($ 13,200 - $ 6,468)/3,300 = $ 6,732/3,300 = $ 2.04

*Fixed overhead = $ 6,468 + (2.04 x 3,800) = $ 6,468 + 7,752 = $ 14,220

Cost for purchasing = $ 13.72 x 3,800 = $ 52,136

Cost of making = Total cost for making + rent opportunity = $ 56,856 + $ 2,600 = $ 59,456

Save in making = $ 52,136 - $ 59,456 = ($ 7,320)

But this was incorrect

Per-Unit Total      Direct materials $3.74    $12,342    Direct labor 4.88    16,104    Variable overhead 2.60    8,580    Fixed overhead 4.00    13,200    Total $15.22    $50,226   

Explanation / Answer

No of units = 3,800

Relavent costs to produce = Direct materials + Direct labour + Variable overhead + Fixed costs associated with the product + Opportunity cost of lost rent

= (3.74 * 3,800) + (4.88 * 3,800) + (2.6 * 3,800) + (13,200 - 6,468) + 2,600

= 14,212 + 18,544 + 9,880 + 6,732 + 2,600

= 51,968

Cost when purchsed = 13.72 * 3,800 = 52,136

Savings = Costs when purchased - Relavent costs to produce

= 52,136 - 51,968

= 168.