Final answer:
The net cost of purchases is $410,000.
Step-by-step explanation:
The net cost of purchases can be calculated by subtracting the purchase returns and allowances, purchase discounts, and freight out from the total purchases. In this case, the net cost of purchases would be calculated as follows:
Total Purchases - Purchase Returns and Allowances - Purchase Discounts - Freight Out
$500,000 - $50,000 - $10,000 - $30,000 = $410,000