The Notes Payable account began with a zero balance and then had the following changes: increase of $500, increase of $200, decrease of $550, and...

The Notes Payable account began with a zero balance and then had the following changes: increase of $500, increase of $200, decrease of $550, and increase of $250. What is the final balance in the Notes Payable account, and is it a debit or a credit? Please show the equations. Thanks!