How To Calculate Cost Of Sales Given Sales And Selling Price?

Compute the cost assigned to ending inventory using FIFO, LIFO, Specific identification: The units sold consist of 490 units from beginning inventory, 310 units from the february 10 purchase, 150 from the march 13 purchase, 90 from the august 21 purchase and 210 from the Sept 5 purchase
FIFO
Cost of goods available for sale 80,180