Printing calculator offers extra large fluorescent display with 12 digits and built-in metal paper arm. Prints 5.2 lines per second in two colors. For amortization issues, print or display an entire schedule, specific month or any range of months. Add, subtract, multiply or divide hours and minutes or minutes and seconds for time billing or payroll applications. Cost-sell-margin keys allow you to quickly and easily solve CSM problems by entering two variables and the third appears and prints. Days between dates function computes the number of days between dates or compute the proper date by entering the number of days. Use financial features to enter amount, term and interest rate to solve for payment. Other functions include two independent tax keys, four-key memory, backspace key, automatic tax keys, units price mode, grand total, percent key, markup/down key, delta percent key, averaging and square root and time/calendar. Uses either twin spool or cartridge ribbon.