Givens Company uses a periodic inventory system. Its records show the following for the month of December 2019, in which 68 units were sold at $100 per unit. Units 30 25 35 90 December 1 Beginning inventory 15 Purchases 24 Purchases Totals Unit Cost Total Cost $9 $270 $275 $12 $420 $965 $11 Required: (Show all calculations and round ALL answers to 2 decimal places.) a. Calculate the cost of Goods Sold on December 31, 2019 for Givens Company using the following cost flow assumptions: (1) Weighted Average Cost method and (ii) First-In-First-Out (FIFO) method. (6 marks) b. Calculate the Gross Profit for the month ended December 31, 2019 for Givens Company using the following cost flow assumptions: (1) Weighted Average Cost method and (ii) First-In-First-Out (FIFO) method. (4 marks)