The EL330F combines the Cost / Sell / Margin function with the handy + Tax and - Tax function in a comfortable desktop size calculator. Large 8-digit display. Comfortable desktop size. Angled display for easy reading. Cost / Sell / Margin function. +Tax / -Tax function. Memory operation. Twin-power solar and battery operated (1x LR44, included). 145mm x 103mm x 30mm. 12 month warranty.