The Sales Summary of Daily Operations
At the end of each work day—(usually the following day for bars since we tend to close at 2 am most nights), the sales summary of daily operations is compiled by totaling all sales from all registers throughout the day. This sales summary gives you a running record of monthly sales throughout the entire year and is a must for bar bookkeeping tax purposes at the end of the year.
All of this information will then be further recorded in a double entry-entry bar bookkeeping system. This can either be an actual physical book, or, these days a bar bookkeeping software system that you keep on your computer, but that you back up onto a disk at least weekly to make sure that it does not get lost.
Ideally should make two disks so that even if you lose one or have one destroyed, you have another disk, at another location, so that you still have some account of your earnings.