22. A manufacturer of staplers has the choice of two processes to produce the housing of the staplers. Method I produces the part with a punch press and smooths it with an abrasive belt grinder. Method II produces the part by casting and smooths it with an abrasive belt grinder. The manufacturer expects to produce 10,000 units per month. The present interest rate is 12%. The factors on which the manufacturer will base the decision are shown in the accompanying table. Determine the monthly cost of each alternative