To see detailed information about your streams and sales once stores have reported your earnings:
1. Visit "BANK"
2. Click "> SEE BREAKDOWN BY STORE..." to expand
3. Scroll down and click "SEE EXCRUCIATING DETAIL"
4. Click the Download button next to DISPLAY in the upper-right.
Here's what the download icon looks like:
The file will save with the extension .tsv (tab-separated value), which you can open in the spreadsheet software of your choosing (Excel, Google Docs, etc.) and sort as you please to sum up earnings per artist/release/etc.
If you have a lot of sales, it could take a minute or so for the file to be generated. Files can get large. A 150,000 row spreadsheet file is about 14mb.