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X Company currently buys a part from a supplier for $13.48 per unit but is consi

ID: 2575381 • Letter: X

Question

X Company currently buys a part from a supplier for $13.48 per unit but is considering making the part itself next year. This year, they purchased 3,400 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, $7,344 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 $2,400; it will have to use this space to make the part. If X Company continues to buy the part instead of making it, it will save

Per-Unit Total      Direct materials $3.44    $11,696    Direct labor 4.39    14,926    Variable overhead 3.30    11,220    Fixed overhead 4.80    16,320    Total $15.93    $54,162   

Explanation / Answer

Allocated fixed overhead ($7,344) should not be considered in decision making, since this is unavoidable and irrelevant.

Fixed overhead per unit = Relevant fixed cost / Estimated units

                                        = (16,320 – 7,344) / 3,800

                                        = $2.36

Opportunity cost per unit = 2,400 / 3,800 = $0.63

Making cost per-unit = Material + Labor + Variable overhead + Fixed overhead + Opportunity cost

                                    = 3.44 + 4.39 + 3.30 + 2.36 + 0.63

                                    = $14.12

Total making cost = Per-unit cost × Estimated units

                              = $14.12 × 3,800

                              = $53,656

Total buying cost = Per-unit cost × Estimated units

                             = $13.48 × 3,800

                             = $51,224

Since the buying cost is lesser than making, there is a saving.

Savings = Total making cost – Total buying cost

              = 53,656 – 51,224

              = $2,432 (Answer)