Calculation of earnings and expenses

How do I call the calculation of the register transactions at the end of the day? I think it cann be called “cashing up” but I’m not sure. Could anyone tell me?

My husband is the manager of a retail store. At the end of the day, he’ll call me to say “I’m cashing out now – I’ll be leaving in a few more minutes.”

thanks Barb.

And how do I call the starting of the day, that is, the act of getting the cash register ready to make transactions? Should I call it “Cash Opening”?