A summary of all sales you can find in the section Bills/Účty in the subsection Bills overview/Přehledy tržeb.To see a details just click on the date. (1) Than you will see the overview of recorded and non-registered bills.(2)
The bills overview is used for an accountancy and you can convert it to PDF or XLS file (3).
This report provide to your accountant.
More information about Electronic sales reporting you will find there.