Printing calculator performs advanced calculations in the palm of your hand and offers a high recycled content. The lower casing is made with a high percentage of recycled plastic. Design also features a 12-digit LCD. Calculator prints 2 lines per second in two colors (ink roller). Positive numbers print in purple, and red numbers are in red. Built-in, low-battery indicator alerts you when it's time to replace the batteries to ensure you never lose your important data. Functions include profit margin calculation, time calculation, tax calculation, rounding, sign change, memory, and decimal positions in 0, 2, 3, 4, A, and floating. Time calculations enable you to analyze time-based fee structures, while the profit margins can be computed with the touch of a few keys. Calculator shuts off after 7 minutes of nonuse and runs on AC/DC power (batteries included).