>Why don't you just retrieve that data when needed?

Joseph,
This was the first thought I had in mind. But then I was asking, how should the supervisor define what he wants to retrieve. There are many options:
which receipt number, which specific day, which customer and so on.
This is a very intensive task to make a form with all this options, and also a report with many variables, called from this form.
Now, this case is -hopefully- used only once a year. I thought, it would be easier to produce an always up-to-date textfile, which the supervisor can open in the old manner, when something very odd is happening.
Or he calls me (once a year?), because for me it would be easy to retrieve this information from the table.