Prompt Logic technology guides the user through various functions in a snap. Innovative 3-line display shows multiple inputs and results simultaneously for ease of use. Loan Wizard quickly and easily calculates installment loan payments. Enter any two variables of cost-sell-margin and the third automatically appears. Two independent tax keys allows you to program two different tax rates. Power Source(s): AC; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 3.