6.4 Analyze and Record Transactions for the Sale of Merchandise Using the Perpetual Inventory System

Merchandising Transactions Using the Perpetual Inventory System

Under the perpetual inventory system, every sale triggers updates to both revenue accounts and inventory accounts at the time of the transaction. This is different from the periodic system, where inventory and cost of goods sold are only calculated at the end of the period. The perpetual system gives you a running, real-time picture of what's in stock and what it cost to sell.

Understanding how to record sales, discounts, and returns under this system is central to merchandising accounting. Each transaction requires two parts: one entry to capture the revenue side and another to capture the inventory cost side.

Perpetual Inventory System for Sales

Every sale under the perpetual system requires two journal entries recorded simultaneously: one for the revenue and one for the cost. This is what makes it different from a service company, where you'd only record the revenue side.

Cash Sales

When a customer pays immediately:

1. Record the revenue side:

   • Debit Cash (increases your cash on hand)
   • Credit Sales Revenue (recognizes the revenue earned)

2. Record the cost side:

   • Debit Cost of Goods Sold (recognizes the expense of the inventory you gave up)
   • Credit Inventory (decreases the asset because those goods are gone)

Credit Sales

When a customer buys on account (pays later):

1. Record the revenue side:

   • Debit Accounts Receivable (the customer owes you money)
   • Credit Sales Revenue (recognizes the revenue earned)

2. Record the cost side:

   • Debit Cost of Goods Sold
   • Credit Inventory

The cost side entries are identical whether the sale is cash or credit. The only difference is whether you debit Cash or Accounts Receivable.

Why this matters: Because both Inventory and Cost of Goods Sold update with every transaction, you can calculate gross profit (Sales Revenue minus Cost of Goods Sold) at any point, not just at period end. This helps with reordering decisions, pricing adjustments, and monitoring inventory turnover.

Sales Discounts and Returns

These transactions adjust the original sale. They use contra revenue accounts (Sales Discounts and Sales Returns and Allowances), which reduce total revenue on the income statement rather than being recorded directly against Sales Revenue.

Sales Discounts

Sellers offer discounts to encourage customers to pay early. Discount terms like 2/10, n/30 mean the customer gets a 2% discount if they pay within 10 days; otherwise, the full amount is due in 30 days.

For example, if a customer purchased $\$1{,}000$ of goods on credit with terms 2/10, n/30 and pays within 10 days:

• The discount is $\$1{,}000 \times 0.02 = \$20$
• Debit Cash $\$980$
• Debit Sales Discounts $\$20$
• Credit Accounts Receivable $\$1{,}000$

Sales Discounts is a contra revenue account, so it reduces net sales on the income statement.

Sales Returns

When a customer sends goods back (defective, wrong item, etc.), you need to reverse both sides of the original sale:

1. Reverse the revenue side:

   • Debit Sales Returns and Allowances (contra revenue, reduces net sales)
   • Credit Accounts Receivable (if sold on credit) or Credit Cash (if sold for cash)

2. Reverse the cost side:

   • Debit Inventory (the goods are back in stock)
   • Credit Cost of Goods Sold (reverses the expense you originally recorded)

Sales Allowances

Sometimes the customer keeps the goods but receives a partial refund (for minor damage, for instance). In this case, you only reverse the revenue side:

• Debit Sales Returns and Allowances
• Credit Accounts Receivable (or Cash)

You do not reverse the cost side because the inventory was not returned. The goods are still with the customer.

Accounting for Payment Scenarios

Full Payment at Time of Sale

This is a straightforward cash sale. Record the two standard entries (revenue side and cost side) as described above under cash sales.

Partial Payment

When a customer makes a down payment and owes the rest:

1. Revenue side:

   • Debit Cash for the amount received
   • Debit Accounts Receivable for the remaining balance
   • Credit Sales Revenue for the full sale amount

2. Cost side:

   • Debit Cost of Goods Sold
   • Credit Inventory

The full revenue and full cost are recorded at the time of sale regardless of how much cash you've collected. Revenue recognition doesn't depend on receiving all the cash upfront.

Returns After Sale

Follow the sales returns process above. The key detail is matching the credit to the original payment method:

• If the customer paid cash, credit Cash to issue a refund.
• If the customer bought on credit, credit Accounts Receivable to reduce what they owe.

In both cases, debit Inventory and credit Cost of Goods Sold to put the returned goods back on the books.

Purchasing and Vendor Relations

On the purchasing side, inventory bought on credit is tracked through Accounts Payable. Managing these payables well means taking advantage of purchase discounts when offered (similar logic to sales discounts, but from the buyer's perspective).

Trade discounts are percentage reductions off the list price that suppliers offer, often based on volume. These are not recorded separately in the journal. Instead, you simply record the inventory at the net (reduced) price.

Maintaining reliable vendor relationships helps ensure consistent inventory supply and quality, which directly affects your ability to meet customer demand and keep your perpetual inventory records accurate.