Financial Modelling

I have done a basic financial model with some shareable assumptions. What I would like is for someone to create the model whereby all the assumptions/permutations can be changed and the formulas are in place that the model reacts accordingly, plus I also need to the model to provide best case and worse case permutations.

I also want to clearly see the gross profit margin, gross profit growth rate. the overall profit and overall profit growth rate

I also would want to see the total value of 1 sale and the total cost of 1 sale