Filtration, Inc. manufactures filters for use in secondary water irrigation systems. The costs per unit, for $20,000$ filters, are as follows.

Direct materials. $.$

$.$Direct labor $......$

Variable overhead

Fixed overhead. $..$

Total costs $..$

$$5\mathrm{.}00$

$6\mathrm{.}00$

$1\mathrm{.}00$

$2\mathrm{.}00$

$$14\mathrm{.}00$

Irrigation Products has offered to sell $20,000$ filters to Filtration for $$14$ per filter. If Filtration accepts Irrigation Products' offer, the facilities used to manufacture filters could be used to produce refrigerator filtration units. Revenues from the sale of refrigerator filtration units are estimated at $$50,000,$ with variable costs amounting to $50\%$ of sales. In addition, $$1$ per unit of the fixed overhead associated with the manufacture of secondary water irrigation filters could be eliminated.

How much would it cost to make the filters and how much would it cost to buy the filters?