I have had some comments on this spreadsheet and most are finding it to be interesting and helpful.
One person did note on Line 28, the Markup Line, that if you entered "0" your results will end up being zero. Obviously, anytime you multiply anything times "0" your answer will be zero. In the event you are doing work for a family member, etc., you would not necessarily want to have a 'markup.'
I am not sure how that might be fixed. You just have to put something there for the formula to work. If anyone can see a way to make this work, I am open to suggestions. The spreadsheet was geared to determine a fair market value for your work and will work for a high percentage of your needs.
Best wishes to you and yours, Pat