Costs associated with two alternatives, code-named Q and R, being considered by Albiston Corporation are listed below: alternative Q alternative R Supplies costs 65,000 65,000 power cost 30,000 29,000 inspection cost 18,000 29,000 assembly cost 33,000 33,000 Required: a. 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