Tradings is an interesting app because you can use it to manage small (or large) businesses efficiently and clearly. You can navigate Top Down and Bottom Up, i.e. from the General to the Individual and back. So from your Trading such as Art to the Marble, Wood and Copper Categories and each to your Trading Objects with data such as Purchase Date, Purchase Price, Sale Date, Sale Price, Profit. And you can see all this summarized in all levels.