The total of the sales journal represents the total amount of credit sales made during a period. This total is posted to the credit side of the sales account, which is an account in the general ledger that records all sales transactions made by the business. The credit side of the sales account reflects an increase in sales revenue, which is a component of the income statement, and represents the total amount of credit sales made by the business during the period. Therefore, the correct answer is the "credit side of sales account".