Missing Amounts in Cost of Goods Sold Model

For each of the following independent cases, fill in the missing amounts:

Enter all answers as positive numbers.

Case 1 Case 2 Case 3

Beginning inventory

? $3,320 $2,550

Purchases (gross) 6,300 7,970 ?

Purchase returns and allowances 500 1,120 760

Purchase discounts

190 ? 470

Transportation-in 160 710 580

Cost of goods available for sale 7,170 ? 11,340

Ending inventory

? 4,230 1,810

Cost of goods sold 5,230 6,090 ?