Advanced Calculator, with Sin, cos, tan values along with binary, square root, log value feature. Best for accountants, because this calculator gives to privilege to create your own formula according to your need. Also can be used as calculator book for sales people. They can add up-to 9 items & modify formula for selling items. No need to search for any other calculator, which meets exactly your requirements. Fulfill your requirements with single calculator. You can Customize 4 custom buttons as per your requirements. Edit buttons & generate formula as per your requirement & make your calculation simple. You can generate upto 4 custom formulas with upto 9 input diff values. No need to create formula for all users. if two or more people are using same items to sell. then only one user can create formula & export it to share with other friends. friends can import it & with one click complete formula can be imported & get ready.