The description of this report is "This report will give you a spreadsheet containing total quantity and value of each product sold for each month."

But the content it gives is not that. Instead, a spreadsheet of the values of different SALES CODES is given. This is one hierarchical level ABOVE product codes. So it is not very granular.  

There is no current way in Kashflow (that I can see) to download a simple report which allows you to compare sales of PRODUCT CODES over time. This is a blinding omission.