Nicklin Corporation is considering two alternatives, code-named M and N, Costs associated with the alternatives are listed below: Alternative M Alternative N Supplies costs $ 65,000 $ 57,000 Power costs $ 38,000 $ 38,000 Inspection costs $ 18,000 $ 27,500 Assembly costs $ 31,000 $ 24,000 Required:

a.

Which costs are relevant and which are not relevant in the choice between these two alternatives?

Supplies costs
Power costs
Inspection costs
Assembly costs

b.

What is the differential cost between the two Alternative R over Alternative Q? (Negative amount should be indicated by a minus sign. Omit the "$" signs in your response.)

Differential cost

$