19. Which of the following errors, each considered individually, would cause the trial balance totals to be unequal? payment of $248 to a creditor was posted as a debit of $248 to Accounts Payable and a debit of $248 to Accounts Receivable. b) Cash received from customers on account was posted as a debit of $450 to Cash and a credit of $450 to Accounts Payable. c) A payment of $79 for supplies was posted as a debit of $97 to Supplies and a credit of $97 to Cash d) A transaction was not posted