beginning inventory, purchases and sales data for the month of august are as follows beginning inventory 10 units @ 25 august 5 sale 5 units august 10 purchase 18 units @ 27 august 12 sale 13 units August 27 purchase 10 units @ 30 assuming the business maintains a perpetual inventory system, calculate the cost of goods sold and Ending inventory using FIFO, LIFO , Weighted Average