it is great if you can develop a .xls format your self
2 go boldly at it. dont be scared .
3 you are the best judge for what you want .
4. after filling up your input data , please go to formulas and select what you want for an answer . there are super formulas which will help you .
5. you can contact me at for any help to work out the formulas.
6. you can add sales tax , excise tax anything you want as long as you know the rates .
7. on one click you will get what you want