Re: Basic Profit/ROI/ITM spreadsheet from burningyen
If your computer is slow. You can go to Tools>Options>Calculation and set it to Manual. That way it won't try to calculate all the cells every time you change one thing. Once you've entered data, hit F9 (the manual recalculation button). You might want to try some of those new Soviet-made vacuum tubes too. That should speed things up.
SlimP
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