4. Quiet Truck manufactures part WB23 used in several of its truck models. 10,000 units are produced each year with production costs as follows: Direct materials Direct labor Variable support costs Fixed support costs Total costs $ 45,000 15,000 35,000 25,000 $120.000 Quiet Truck has the option of purchasing part WB23 from an outside supplier at $11.20 per unit. If part WB23 is outsourced, 40% of the fixed costs cannot be immediately converted to other uses. Required: (15 points) a. Describe avoidable costs. What amount of the part WB23's production costs is avoidable? b. Should Quiet Truck outsource part WB23? Why or why not? c. What other items should Quiet Truck consider before outsourcing any of the parts it currently manufactures? 5. Assume you are a sophomore in college and are committed to earning an undergraduate degree. Your current decision is whether to finish college in four consecutive years or take a year off and work for some extra cash. Required: (20 points) a. Identify at least two revenues or costs that are relevant to making this decision. Explain why each is relevant b. Identify at least two costs that would be considered sunk costs for this decision. c. Comment on at least one qualitative consideration for this decision