Comment by didgetmaster

I have no doubt that a pandas expert (or a postgres expert, or a mysql expert, or..) can whip up something fairly quickly to load in the data and find the totals.

My tool is designed for people who are not experts but just have a basic understanding of relational tables (e.g. someone comfortable with a spreadsheet) to be able to load a data set like this and analyze it with just a few clicks of a mouse. Using it, I was able to do the whole thing in about 2 minutes.

BTW: When my numbers did not match up with another HN commenter on this thread, I investigated and found a bug in my code. Once fixed the numbers were correct. (I guess that's why it is still in beta!)