Here is information relating to the beginning inventory, purchases and sales for the month of May 2019 for Maju Enterprise (SME). Sales/unit Date 2019 May 1 5 Unit 50 unit & RM6 Particulars Beginning Inventory Sale Purchase Sale RM8.50 8 20 unit 45 unit @ RM7 22 unit 15 RM8.50 20 Purchase Sale 40 unit @ RM8 35 unit 24 RM9.00 calculate cost of ending inventory, Cost of good sold and profit when SME use perpetual system and periodic system with FIFO and weighted average method