Ideal for balancing budgets, calculating expenses, & totaling up sales, this profit analyzer calculator is a small business & retail essential. Dual power functionality offers energy-saving solar power combined with battery power to work in any lighting. The 12-digit LCD display handles large calculations & equations. Easily read the correct answer, thanks to the 0.74" (19mm) digit size. Angled display prevents overhead glare & eyestrain. Markup, Cost / Sell / Margin, & Grand Total keys, along with decimal slide switch, provide added functionality for business needs. Power Source(s): Battery; Solar; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 1.