Commercial Desktop Calculator with Equals Plus Logic prints 4.6 lines per second in two colors. Uses a two-color twin spool ribbon. Features a left-hand total key, extra large fluorescent display, 12-digit capacity, built-in metal paper arm, markup/gross profit margin key, cost-sell-margin keys, four-key independent memory, Delta percent-percent of change, percent key, change sign key, grand total, item count, date/nonadd key, square root key, backspace key, and automatic constants. Offers two independent tax keys so you can easily compute two different tax rates such as city/county or county/state. Time and date displays, and calculator prints current time or date at the touch of a key.