1/2 inventory 2/2 purchases 500 units 3/2 5/2 purchaes 6/2 300 units 3000 $ 7500$ sold units 600 units for 12000$ cash 400 units 1.4$ per unit 450 units for 2.5$ for each units aold QUnder .

1) perpetual system -FIFO method and WA method compute Gross margin I

2) under periodical system Compute Gross margin using FIFO and WA?