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Costs associated with two alternatives, code-named Q and R. being considered by Albiston Corporation are listed below. Supplies costs Power costs Inspection costs Assembly costs Alternative $66,000 $30,500 $19,089 $34. Alternative R $66,000 $29,680 $29,608 $34.000 Required: Which costs are relevant and which are not relevant in the choice between these two alternatives b. What is the differential cost between the two alternatives? a Supplies costs Power costs Inspection costs Assembly costs b. Differential cost