It has 2 tabs, the first tab shows the actual data of selected computer. The data shown can be edited temporarily or permanently. All the data can be deleted too, so that you can restart the log data file afresh.
The second tab shows the calculated amount of income from all the computers, either of the whole data (since it started), or the data of within specified period.
You can choose to retrive or calculate either all the data, or the datas before a specified date, between two specified dates, of a certain month, or multiple months. You can choose this from the frame on the left side of the tabs.