They are here: i.imgur.com/Sy58C.png
There are five. In order, they describe:
1. Total number of transactions
2. Total number of "units" of items sold (a stack of 60 meat can sell in one transaction, but it counts as 60 units sold).
3. The number of currants spent
4. Average currants per sale (#3 divided by #1)
5. Average units per sale (#2 divided by #1)