EPOS into your accounts package
What gets connected: takings by department, Z-read totals, payment types split into cash, card and account, VAT by rate, and stock values where the till is holding them.
What changes day to day: nobody types a Z-read into anything. The numbers land already coded to the right nominals, at the same time every day, in the same format. A missing day is visibly missing, which is not true of a spreadsheet. The quarterly VAT job stops being an archaeology exercise.