In a building cost estimating spreadsheet, I use my final total to calculate some of the cost components. For example, my engineering and permit fees are both a function of my final cost. I set up an iterative calculation so that it closes to my final cost. This works fine until a cell goes out of bounds, causing the cell formula to return a #REF result. I would like to prevent this from happening. Does anyone know of a formula or technique that will help this problem?
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