Alpha correctly recorded a $500 purchase of inventory on credit with terms 2/10, n/30. Assume that Alpha uses the periodic inventory system. At the time of delivery, Alpha returned $100 of the inventory and paid the balance owed (within the discount period in order to be entitled to take the discount). The purchase had previously been recorded correctly. Select the compound journal entry to record the transactions for the return and payment. O Debit Accounts Payable $400, debit Purchase Returns & Allowances $100, credit Cash $400, and credit Inventory $100. O Debit Accounts Payable $500, credit Purchase Discounts $8, credit Cash $392, and credit Inventory $100. Debit Accounts Payable $500, credit Purchase Discounts $8, credit Cash $392, and credit Purchase Returns & Allowances $100. The correct answer is not listed. Debit Accounts Payable $500, credit Purchase Discounts $10, credit Cash $390, and credit Purchase Returns & Allowances $100