Back of napkin calculations in east bay

[Ari Archer]

I'm curious what sort of back of napkin calculations people use in the East Bay to get a quick picture of cash flow. It would appear that nothing passes the 2% test. 50% rule seems to be working ok, but I'm curious if anyone uses it around here or if anyone has other quick tests they run. I know every place is different and you need to run full numbers on places you're really interested in. Just looking for a broad/simple first test.

Thanks!