Cardon, Inc. is considering two options, X and Y. Costs associated with each option are listed below: Supplies costs Power costs Inspection costs Assembly costs Option X $66,000 $30,500 $19,000 $34,000 Option Y $66,000 $29,600 $29,600 $34,000 Required: a. Which costs are relevant and which are not relevant in the choice between these two options? b. What is the differential cost between the two options? a. Supplies costs Power costs Inspection costs Assembly costs b. Differential cost