16. According to the following list, what was the total amount of money spent on external failure costs for the month? Legal services for product liability case: $15,000 Design review: $30,000 Field testing: $60,000 In-house scrap and rework: $50,000 Process control: $10,000 Repair of customer returns: $4,000 Product audits: $10,000 Variability analysis: $5,000 Quality training: $20,000 Maintenance of testing equipment: $1,500 A. $19,000 B. $4,000 C. $50,500 D. $55,000