LOL, Kathryn, I didn't even try to do the math. I really stink at it. They usually let me know if they are hungry so I'm probably good.
CLM, I don't feed my gang much dry. I've been able to get them either to stop eating it or just eat little. Their weight is steady and they don't act like they're hungry all the time. I actually just gave them a little snack and none of them ate it all, so I think I'm fine.
There are only two rules at my house: House rule #1. Cats rule. House rule #2. See rule #1.