Redding Bookstore had 1020 units on hand at January 1 , costing $9 each. Purchases and sales during the month of January were as follows: Redding does not maintain perpetual inventory records. According to a physical count, 1080 units were on hand at January 31. Required: Calculate the cost of the inventory at January 31, under the FIFO-Lifoand Simple Average method is and also calculate the COGS for January under each method. This problem has 15 points available. You must show how you calculate each number. If you use an excel spreadsheet you will need to email me your finished work