I usually carry $100.00, 20 ones.6 fives, and 5 tens. I keep this money in my pocket. I also have extra hidden away in case I get a run on 20 dollar bills. Also, I don't recommend a money box. If you are busy with a customer, that box could turn up missing. Using your pocket or a fanny pack is a better option. Oh yes, I don't add on tax. That is included in the price. This eliminates the need for small change.