Schedule of Activity Costs Quality Control Activities Activity Cost Product testing $55,000 Assessing vendor quality 26,000 Recalls 18,000 Rework 29,000 Scrap disposal 8,000 Product design 30,000 Training machine operators 46,000 Warranty work 12,000 Process audits 22,000 From the above schedule, calculate the following: a. Value-added costs $ b. Non-value-added costs $