The following costs were incurred by Valley Fabrications Ltd to maintain the quality of its products during April:

operating an X-ray machine to detect faulty welds, $5 400

repairs to faulty products returned by customers, $12 000

cost of rewelding faulty joints discovered during processing, $3 800

cost of sending machine operators to a three-week quality training program, $11 600

cost of recalling faulty products, $20 000

legal fees related to product recall, $3 600

product inspection into finished goods warehouse, $3 400

cost to confirm a supplier's quality accreditation, $600

cost of faulty goods that were scrapped, $16 800.

2. Comment on the relative proportions of each of the four categories of quality costs.

Please help me !!!