Schedule of Activity Costs Quality Control Activities Activity Cost Process audits $49,100 Training of machine operators 27,100 Processing returned products 15,700 Scrap processing (disposal) 25,900 Rework 5,600 Preventative maintenance 29,900 Product design 40,300 Warranty work 7,100 Finished goods inspection 22,100 From the provided schedule of activity costs, determine the prevention costs O a. $57,000 Ob. $113,000 O c. $97.300 O d. $102,900