Executive Desktop Display Calculator features a super large, easy-to-read, 12-digit tilt liquid crystal display (LCD). Cost-sell-margin keys allow you to solve CSM problems quickly and easily; enter two variables and the third appears. Functions include three-key independent memory, tax rate keys, tax +/- keys, percent key, selectable decimal settings, round up/down feature, automatic constants, change sign key +/- and backspace key. Solar powered with battery backup.