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 25,700 18,700 26,400 5,600 29,700 41,300 6,200 23,700 From the provided schedule of activity costs, determine the internal failure costs. O a. $98,200 O b. $56,900 O c. $25,600 O d. $32,000