Schedule of Activity Costs Quality Control Activities Activity Cost Process audits $50,700 Training of machine operators 25,500 Processing returned products 17,100 Scrap processing (disposal) 26,700 Rework 5,100 Preventative maintenance 30,100 Product design 45,500 Warranty work 8,800 Finished goods inspection 23,000 From the above schedule of activity costs, determine the total activity cost. a. $153,900 Ob. $281,325 Oc. $232,500 Od. $99,600