AVG COGS

Ok, i thought this was straight forward but i’m still not getting it… Units Unit Price Beginning Inventory 559 $1.00 Purchases 785 $5.00 Sales 848 $15.00 SGA Expenses $3,191 per annum What is the cost of goods sold using the average cost method? A) $2,829.19. B) $2,004.00. C) $3,988.00. D) $2,687.73. Average cost = cost of goods available / total units available. COGS = Units sold × wt. ave = 848 × 3.33631 = $2,829.19. Is the average cost not $3 ?

average cost = (beginning inventory*price +units purchased*purchasing price)/(beginning inventory+units purchased)=(559*1+785*5)/(559+785) =3.33631