Final answer:
The correct entry for the error in recording a collection on account would be to debit Accounts Receivable (or Customer Accounts) for the amount received and credit Cash for the same amount.
Step-by-step explanation:
The correct entry for the error in recording a collection on account would be to debit Accounts Receivable (or Customer Accounts) for $780 and credit Cash for $780.
This is because the cash was received from the customer and should be recorded as an increase in the cash account (debit) and a decrease in the accounts receivable (credit).
By making this correction, the financial statements will accurately reflect the amount owed by the customer and the cash received.