Heavy duty Calculator with Check & Correct Function and Preset 5% Tax Rate DS-2JT features the classic design of earlier popular heavy duty calculators, with a dark gray plastic case surrounding the display and keypad that exudes reliability. Direct calculation of Price Plus Tax & Price Less Tax Preset tax:5% How to calculate the tax-in price from the pre-tax price: How to calculate the pre-tax price from the tax-in price: *can be changed to any rate Durable Anti-fade keys 28 keys, including numeric and arithmetic keys, are produced by injecting plastic of two different colors. The markings of the 28 keys are plastic, which means they do not wear or fade with use. Key cross-section The 300 Steps Check function helps to prevent calculation mistakes! Review and Auto Review Review up to 300 calculation steps. Auto Review by pressing one single button! While reviewing a calculation, you can make changes in values and operators and re-execute to obtain a new result. Grand total Automatic totalization of the results of different calculations. Insert / Delete You can add steps to or delete steps from Calculation Memory. Note that if the number of steps in Calculation Memory exceeds 300, you will not be able to review them later. Add steps Delete steps * The LCD icons are shown enlarged for easier viewing. Recheck with Sound Assist The recheck function allows confirmation of errors by sound when checking calculations. If the user presses an incorrect key when performing a second calculation to check calculation results, a buzzer sounds to alert the user of the error. First calculation Second calculation * The LCD icons are shown enlarged for easier viewing. Key Layout and Key Cap Shape Keys are ergonomically shaped and configured to match natural finger movements. Three-Key Rollover Key rollover supports fast input by registering the next key press even before the previous key is released. Non-slip Structure Large rubber feet on the bottom of the calculator keep it from slipping during operation. Function Command Signs A symbol (+,−,×,÷) on the display indicates the status of the operation you are currently performing. Silent Touch Keys Keys are specially designed for silent operation when compared to previous CASIO calculators to help maintain a more pleasant working environment. Solar & Battery Solar powered when light is sufficient, battery powered when light is insufficient.