Specialty foods, inc. maintains a separate accounts receivable account for each customer. regarding this accounting treatment, which of the following statements is incorrect? a. the separate customer accounts receivable are called subsidiary accounts. b. the purpose of this accounting treatment is to account for payments received from the customer and the amounts still owed. c. the sum of all balances in the subsidiary accounts receivable equals a control account balance. d. when a customer makes a payment on account, a debit is posted to the accounts receivable subsidiary account as well as to the accounts receivable control account.