I understand SI's goal is not to be a full on accounting system, but it would be very nice to have a report that states the overall sales by month. Even though I don't need a fancy graph, it would be nice to see a turnover/month table. If this takes two hours to implement, I'm willing to pay AU$100, if it is released in the general version.
Maybe I'm asking too much, but how about a slight change to the "reports" menu? I would find it more logical if it was structured this way:
Overall Sales -total -by customer -by month (new requested feature)
Product Sales -by product -by customer
Biller Sales -by biller -by customer
Debtors -by amount owed -by aging periods -total owed per customer -total by aging periods
Tax
reasoning behind this: invoicing is all about sales, so this should come first. Grouping the 3 sales reports on the top. Then Debtors, then Tax. It means the current menu with 7 options is reduced to 5, but with more depth, as every main menu option has sub-options. I find it confusing that the current menu sometimes has 'sub'options and sometimes not (eg sales+ vs debtors+) No plus sign for menu options that do not have a deeper level could be another way of making that distinction.