On the Reports project tab there are two sections; Summary and Performance.
The first one shows the sum of the total of the documents you have related according to document type.
The second section, shows the profitability based on the sum of the items according to purchase and sale price in the generated documents.
For the profitability to be correct, you must indicate the purchase and sale price of the product at the time of registering the document.
Under the graphs you will find the products that are included in the documents, being able to access each of them and check the purchase and sale price that they have indicated.