Part-A Wahda Co. incurred the following transactions during the month of January 2019. Jammary : Beginning Inventory (50 units @ 10 per unit). Jamuany 10: Purchased 40 units @ 11 per unit. JANY 15: Sold 60 units @ 15 per unit Jammy 22: Purchase 60 units 12 per unit. January 31: Sold 70 units @ 16 per unit. Required: Use "FIFO" methods and calculate the following: (5 maks) a Calculate cost of ending inventory on January 31, 2019 6. Calculate cost of goods sold for the period ending on January 31st 2019 Note: You need to make a table showing the following columns to show your working: Date Purchases Cost of goods sold Inventory Balance Part 3 What is the consistency principle as per floancial reporting standards and why a company should follow this principle? (1 mark)