Calculation of cost of goods sold under a periodic system:
It is given that the beginning inventory is $100,000, cost of goods purchased is $500,000, and ending inventory is $130,000. The cost of goods sold can be calculated as follows:
Cost of Goods Sold = Beginning inventory + Cost of goods purchased- Ending inventory
= 100,000 + 500,000 – 130,000
= $470,000
Hence, the cost of goods sold is $470,000