Costs associated with two alternatives, code-named 6 and 28, being considered by Dodson Corporation are listed below:

Costs associated with two alternatives, code-named 6 and 28, being considered by Dodson Corporation are listed below: Alternative 6 Alternative 28 Supplies costs Power costs Inspection costs Assembly costs $ 75,00067,000 $ 48,000 48,000 28,000 $ 42,500 30,000 $ 41,000 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 (Click to select) (Click to select) (Click to select) (Click to select) b. What is the differential cost of Alternative 6 over Alternative 28? (Negative amount should be indicated by a minus sign. Omit the "$" signs in your response.) Differential cost