Gaga Pty Ltd sells a particular type of calculator. At the beginning of financial year, there were 1200 units in Gaga's inventory costing $20.00 each. Inventory purchases were made quarterly as follows: Quarter Units 1 2 3 4 2 500 3 200 3 500 4 400 13 600 Unit Cost $22.50 $24.25 $26.00 $27.50 During the year, Gaga sold 13 300 units. At the end of the year a stock take revealed a closing inventory of 1500 units. Required Calculate the cost of inventory on hand at the end of financial year and the cost of sales under weighted average method.