ABC Inc. sells socks. During January 2016, its inventory records for one brand of its socks were as follows:

Quantity Priceper pair Total

Beginning Inventory10 pairs $20 = $200

January 6 Purchase 4 pairs $25 = $100

January 10 Sale 5 pairs N/A

January 15 Purchase7 pairs $30 = $210

January 20 Sale 10 pairs N/A

January 25 Purchase4 pairs $30 = $120

Using the periodic simple average cost method, what is the cost of goods sold?