For the best terms on a loan or credit card, you need a credit score above 700. to achieve this, start establishing credit now. pay all of your bills on time. in addition, use only one-third of your available credit limit and pay off your revolving balance(s) each month. r. j.johnson has excellent credit. she wants to purchase a piece of equipment for her business and was offered 7% for 72 months for the $62,000 unit. what is her monthly payment by add-on method?