Kim, I don't know if they will have you looking for errors or not. At Chase, the tellers no longer have to try to find their errors. Somebody, some where else does that. The teller recounts her drawer if it is off and then somebody else counts it to be sure the first person didn't miss something. Because I started waaaay back when we entered numbers on a "blotter" and added the columns with a columnar adding machine, we had to try to find the errors when we didn't balance. We knew that the cash from the previous day was a certain amount. To that we added the credits and subtracted the debits and that was how the drawer should count up.
Anyway, one of the things I'll never forget and that is anything divisable by 9 can be a transposition. For instance, you take in $100 but enter $10. The difference is $90 and sure enough it is divisable by 9. Take $27 and enter $72 and you are off by $45. Yup divisable by 9. Trouble is, just knowing that doesn't point out the number you are looking for. Oddly enough, you can be out of balance and look at the item that is wrong over and over and still not have it register that you are looking at an incorrect figure. That is why sometimes it is better to have somebody else look over your stuff. One of the scariest numbers to be off is $100 or $1000 because they are so common, especially $100. And it is so easy to enter something wrong by $100 or miscount by $100. When I counted, I always counted , 20, 40, 60, 80, ONE Hundred, 20, 40, 60, 80, Two hundred, 20, 40, 60, 70, 80, 85, 86, 87 AND 39 cents. If I was counting lots of 5s. I counted 5, 10, 15, 20--5--30--5--40--5 so I didn't say 25, 30, 35, 40, but I suspect you have already settled on a way to handle the money. Hope you have "sortkwik". It keeps your fingers moist so the money is easier to handle. Hand lotions works well too.
Do they make you keep the presidents all facing the same way? I have noticed that Chase doesn't any more.