Schedule of Activity Costs Quality Control Activities Activity Cost Process audits $52,000 Training of machine operators 25,100 Processing returned products 20,600 Scrap processing (disposal) 24,400 Rework 6,200 Preventative maintenance 27,800 Product design Warranty work 45,500 9,000 Finished goods inspection 23,200 From the provided schedule of activity costs, determine the prevention costs. Oa. $98,400 Ob. $104,600 Oc. $119,000 Od. $52,900