Definitions of manufacturing concepts Interstate Manufacturing produces brass fasteners and incurred the following costs for the year just ended: Materials and supplies used Brass $75,000 Repair parts 16,000 Machine lubricants 9,000 Wages and salaries Machine operators 128,000 Production supervisors 64,000 Maintenance personnel 41,000 Other factory overhead Variable 35,000 Fixed 46,000 Sales commissions 20,000 Compute: a. Total direct materials consumed b. Total direct labor c. Total prime cost d. Total conversion cost