Assume that a retailer's beginning inventory and purchases of a popular item during January included (1) 300 units @ $7 in beginning inventory on January 1 (2) 450 units @ $8 purchased on January 8 (3) 750 units at $9 purchased on January 29 The company sold 350 units on January 12 and 550 units on January 30. To Do: Calculate the cost of goods sold for the month of January under the following methods: Show all calculations! (a) FIFO (periodic calculation) (b) FIFO (perpetual calculation) (c) LIFO (periodic calculation) (d) LIFO (perpetual calculation) (e) Average-Cost (periodic calculation) (f) Average-Cost (perpetual calculation)