Doing things right costs much more than doing things that are probably good enough. Or to put it another way, on the back of a napkin expect the last 20% to co

Doing things right costs much more than doing things that are probably good enough. Or to put it another way, on the back of a napkin expect the last 20% to cost 4x the first 80%. Or to put it another another way, 80% of Excel is not 80% of Excel if you get my point. Good luck.