Tax Calculation KeysUse dedicated Tax+ and Tax- keys to do calculation for price plus tax, price less tax, discount, selling price, tax amount, discount amount, and margin amount. Set your tax rate once and keep calculating. | Percent KeyDedicated key for percentage calculations. Calculate %age value of any number for discount, contribution, margin or any mathematical purpose. | Go To keyChecking your inputs and you know where is the mistake? Jump directly to that step by using Go To key. | Mark Up KeyCalculate your selling price based on certain %age over selling price. |