Select the time-frame for which you want to see account activity. If you choose C, you will be shown all transactions that are in the Current files, which can be up to the past eleven months. If you type in a year (e.g. 92) you will be shown transactions that have been purged to that yearly file. If you choose A (All), you will be shown all transactions from the Current files and all the Yearly (purged) files. Choosing All will show you the most detail, but it will take longer to examine all yearly sales files.
Note that the Current sales file may contain sales from this calendar year and a portion of the previous calendar year. So if you type in the previous calendar year, the report will not show those sales that are from the previous year but are still in the Current sales file. To be sure to see all sales, you may want to choose All.