Alta had beginning inventory of 100 units at $10 each. Purchases during the period were 200 at $11 each, 300 at $13 each, and 150 at $15 each. Sales were 500 units at $20. Using periodic weighted-average inventory:

ending inventory is $2,650.

gross profit is $4,200.

None of these.

All of the above.

cost of goods sold is $6,233.