I willmake the following changes before releasing for distribution.
1. Formatting to show what type of value user has to enter. For example I will add % to the heading at B5 , (#) to C5, ($) to rest of the columns, so that the user will understand a percentage has to be entered.
2. Enter comment s about the type of input expected in cells B6:G6 so that this will help the user to enter correct inputs.
3. Protect the sheet and allow only A6:G6 cells for input. This is to make sure the user does not change the formulas.