Mary's Mugs produces and sells various types of ceramic mugs. The business began operations on January 1, year 1, and its costs incurred during the year include these: Variable costs (based on mugs produced): Direct materials cost $ 3,400 Direct manufacturing labor costs 25,280 Indirect manufacturing costs 1,140 Administration and marketing 2,350 Fixed costs: Administration and marketing costs 11,800 Indirect manufacturing costs 4,180 On December 31, year 1, direct materials inventory consisted of 3,400 pounds of material. Production in that year was 17,000 mugs. All prices and unit variable costs remained constant during the year. Sales revenues for year 1 was $52,500. Finished goods inventory was $6,000 on December 31, year 1. Each finished mug requires 0.4 pounds of material. (Do not round intermediate calculations.) Required: a. Compute the direct materials inventory cost, December 31, year 1. b. Compute the finished goods ending inventory in units on December 31, year 1. (Do not round intermediate calculations.) c. Compute the selling price per unit. (Round your answer to 2 decimal places.) d. Compute the operating profit (loss) for year 1.