Han Products manufactures 22,000 units of part S-6 each year for use on its production line. At this level of activity, the cost per unit for part S-6 is:
Direct materials $5.60
Direct labor 6.00
Variable manufacturing overhead 3.60
Fixed manufacturing overhead 12.00
Total cost per part $27.20
An outside supplier has offered to sell 22,000 units of part S-6 each year to Han Products for $44.50 per part. If Han products accepts this offer, the facilities now being used to manufacture part S-6 could be rented to another company at an annual rental of $551,600. However, Han Products has determined that two-thirds of the fixed manufacturing overhead being applied to part S-6 would continue even if part S-6 were purchased from the outside supplier.
Required:
a. Calculate the per unit and total relevant cost for buying and making product. Round per unit answer to 2 decimal place.
b. How much will profits increase or decrease if the outside suppliers offer is accepted?

Profit decrease = $6,000

Explanation:

As per the data given in the question,

a)

Calculation for buying and making product :

Particulars                Per unit Differential cost           22,000 units

                                    Make          Buy                             Make         Buy

Cost of buying                            $44.50                                         $979,000

Cost of making :

Direct material           $5.60                                          $123,000

Direct labor              $6.00                                           $132,000

Variable manufacturing

overhead                  $3.6                                              $79,200

Fixed manufacturing

overhead                  $4                                               $88,000

                          ($12 × 1 ÷ 4)

Opportunity cost                                                          $551,600

Total cost                $19.2    $44.50                             $973,800  $979,000

b) As we can see that the Profit is decrease by $6,000 in case of outside supplier offer accepted  by taking the difference between the making and buying cost i.e

=  $979,000-$973,800

= $6,000

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link :

answer; by looking at total product,marginal product,and changes in both after changes in inputs