Sales price $400 $390 Sales revenue $360,000 $390,000 Cost of goods sold $192,500 $180,000 Material purchased at 5,000 pounds $137,500 $140,000 Material usage $90,000 $89,000 Production volume 950 units 900 units Wages at 4,000 hours $30,000 $29,350 Labor usage at $12 per hour $48,000 $48,500 Research and development expense $11,000 $12,500 Selling and administrative expenses $24,500 $20,000