Large 12-digit LCD is easy to read. 2-colour ink-roller printer provides hard copy of calculations.  Prints at 2.7 lines per second. Cost/sell/margin keys allow quick and easy profit margin calculations.  Simply enter 2 variables and the third automatically appears. Tax keys for easy tax calculations.  Other functions include: constants in multiplication and division, percentage add-on and discount, time/date, change-sign key, and item count. 4-key independent memory stores results. Includes antimicrobial protection.  Reduces the growth of microbes and bacteria, which can cause discolouration and odours. Operates on 4 AA batteries or AC power.  (Batteries sold separately; AC adapter included.) Contains 45% recycled plastic.