Answer and Explanation:
a-1 The extra cost or saving is as follows
Cost-saving $36,900
Less: Increased cost ($410,000 × 10.5%) $43,050
Loss -$6,150
a-2 Since the company has suffered the loss of $6,150 so the company should not go to switch to level production
b. Now the interest rate is
= Saving cost ÷ Inventory cost increased × 100
= $36,900 ÷ $410,000 × 100
= 9%
This interest rate is decreased by 9% or the switch is less for the feasible
In the case when the inventory has to be considered permanent current assets and the locking long term interest rate is 10.5% so the switching option could be chosen but if it is volatile in short term interest rate, so it would become dip for short term interest rate i.e below 9%