Eight-digit, handheld calculator with tax function features extra-large, eight-digit, slant liquid crystal display (LCD) and durable metal cabinet. Functions include positive/negative tax keys, decimal setting (F, 2, 0), percent key, four-key memory(memory plus, memory minus, percent and recall/clear memory keys) and constant calculation. Twin Power Solar Operation automatically switches from solar cells to battery power in low light. Calculator weighs 2.1 oz.