Following is an inventory flow during June: Beginning inventory(1/6/2020) 70 units at a cost of $20 per unit, 5/6/2020 purchases 50 units at a cost $25 per unit, 15/6/2020 purchases 80 units at a cost of $30 per unit, 25/6/2020 purchases 100 units at cost of $26 per unit, at the end of month the total sales was 250 units at a selling price of $40 per unit, using WA method the cost of goods available for sale is?