Nautical Footware Inc. manufactures women's boating shoes. Manufacturing overhead is assigned to production on a machine-hour basis. For 2019, it was estimated that manufacturing overhead would total $355,640 and that 26,550 machine hours would be used. Required: a. Calculate the predetermined overhead application rate that will be used for absorption costing purposes during 2019. (Round your answer to 2 decimal places.) b. During May, 3,300 pairs of shoes were made. Raw materials costing $6,910 were used, and direct labor costs totaled $9,830. A total of 720 machine hours were worked during the month of May. Calculate the cost per pair of shoes made during May. (Do not round intermediate calculations. Round your answer to 2 decimal places.) c. At the end of May, 1,410 pairs of shoes were in ending inventory. Calculate the cost of the ending inventory and the cost of the shoes sold during May. (Do not round intermediate calculations. Round your answers to 2 decimal places.)