Prompt Logic technology guides the user through various functions in a snap. Loan Wizard quickly & easily calculates installment loan payments. Enter any two variables of cost-sell-margin & the third automatically appears. Two independent tax keys allows you to program two different rates. Help key explains features on the display & in print. Text keys store & print up to six custom messages on your tape printout. Power Source(s): AC; Display Notation: Numeric; Number of Display Digits: 14; Memory: 4-Key.