Schedule of Activity Costs Quality Control Activities - Process audits Training of machine operators Processing returned products Scrap processing (disposal) Rework Preventative maintenance Product design Warranty work Finished goods inspection Activity Cost $50,000 28,000 19,000 25,000 8,000 30,000 46,000 12,000 23,000 From the above schedule of activity costs, determine the prevention costs. Oa. $74,000 Ob. $104,000 Oc. $30,000 Od. $76,000