please solve

Using the LIFO inventory method, what is the cost of goods sold? Date Source Units Purchased Cost Per Unit Total Cost $48 $42,000 $46 Beginning 1/1/2011 875 Inventory 2/1/2011 Purchase 630 3/1/2011 Purchase 940 Total Goods Available for Sale 2,445 Units sold 1825 $52 $28,980 $48,880 $119,860 $75 $89,466 $87,620 $90.100 $77.860