Answer:
Flounder should buy.
Relevant cost of making $ 74,730
Relevant of buying $58,100
Step-by-step explanation:
Relevant cost are future incremental cash cost that arise as a direct consequence of a decision.
The relevant costs of making the tires internally are
$
Variable cost of making
(3+4+1)× 5,810 46,480
Incremental fixed cost = 28,250
Total relevant cost 74,730
Relevant cost of buying
External cost × units = 10× 5,810 = $58,100
Flounder Rides should buy as this will save it $16630 i. e (74,730 - 58100)