PART (A) The table below shows the beginning inventory, purchase and sales of the Gypsum company's single product over the financial year 2020. Beginning Inventory & Purchases Date Description Units Cost Total Jan 1 Opening balance 10 $1.00 $10 Jan 1 Purchases 40 $1.10 $44 Jan 2 - Jun 30 Sales 35 $1.60 Jul 1 Purchases 50 $1.30 $65 Jul 2 - Dec 31 Sales 45 $1.70 Required: Calculate the Cost of Goods Sold and the Ending Inventory for the year ended December 31, 2020. (Show all workings) Periodic Inventory System Inventory Method Last-In, First-Out Cost of Goods Sold ? (2 marks) Ending Inventory ? (2 marks) Perpetual Inventory System Inventory Method First-In, First-Out Last-In, First-Out Cost of Goods Sold ? ? (5 marks) Ending Inventory ? ? (3 marks)