By default, BunyMuny checks for rules in `rules.csv` in the current directory.
This is a Comma Separated Values file, which can be edited either by hand, or with a program like [Libreoffice Calc](https://www.libreoffice.org/discover/calc/) or [Microsoft Office Excel](https://www.microsoft.com/en-au/microsoft-365/excel).
- Any statement that starts with "Purchase Cash Converters" (case sensitive) will be assigned the category "Personal", and the description "Cashies".
- Any statement with the *exact* description "Purchase TRANSLINK BRISBANE" (case sensitive) will be assigned the category "Transport", and the description "Go Card".
- Any statement that doesn't match these two rules will be categorised as "Other", and will use the description provided by the bank file.