Who was working when? With a thrift store, particularly as a non-profit, you probably have a mass of different people working for you.
Some of them are staff, some are volunteers, and some are doing community service hours. It's a lot to keep track of.
The ThriftCart timesheet management system allows you to track who is working. You can set up projects and sub-projects to see how your time is spent.
It also has security features, such as taking webcam pictures during a sign in, to ensure that the person making the entry is indeed the right person.