Schedule of Activity Costs Quality Control Activities Activity Cost Process audits $50,800 Training of machine operators 25,700 Processing returned products 18,100 Scrap processing (disposal) 25,200 Rework 8,500 Preventative maintenance 31,000 Product design 42,600 Warranty work 9,800 Finished goods inspection 22,800 From the above schedule of activity costs, determine the total activity cost. a. $155,000 Ob. $234,500 Oc. $283,745 Od. $102,600