Every purchase transaction you just studied has a matching sale on the other side of the counter. When Bramwell Hardware buys from its supplier, the supplier is recording a sale. The Sales account is the revenue account that records the selling price of merchandise sold to customers — for cash or on account. Like any revenue account, Sales carries a credit balance and increases owner's equity.
Sales invoices and credit sales
When merchandise is sold on account, the seller prepares a sales invoice — the bill completed by the seller and given to the buyer as a record of a credit sale. It lists the items, quantities, prices, credit terms, and any sales tax. That same document is the buyer's purchase invoice — one document, two names, depending on which side of the transaction you are standing on.
Sales Returns and Allowances
Sales Returns and Allowances is used by the seller to record merchandise returned by a customer (or a price allowance granted on goods the customer keeps). It is a contra-revenue account with a debit balance, subtracted from Sales when Net Sales is calculated. The seller documents the reduction with a credit invoice — a source document issued by the seller to indicate the amount of credit allowed to a customer for returned or defective goods. Credit invoice, credit memorandum, and credit note are three names for the same document.
Sales Discounts
Sales Discounts are offered to encourage early payment of customer account balances — they are the seller's side of the same 2/10, n/30 terms studied in the Purchases topic. Sales Discounts is a contra-revenue account (debit balance) that reduces Sales when the customer pays promptly.
Delivery Expense
Delivery Expense is used to record the cost of delivering merchandise to customers — freight the SELLER pays to ship goods out. It is an operating expense on the income statement, not part of Cost of Goods Sold, because it is the cost of getting the sale to the customer, not the cost of acquiring the merchandise in the first place.