Need to know the true ordered sum of products

[balderfredrik]

I have Prestashop 1.6 running with 15 different shops. I need to know the exact sales of each product per month.

If I use Best products in statistics it uses the base price and does not take into account sales happening during the selected time period.

Does anyone have a SQL-query or know of a module that lets me see the real and true sum per product and month?

Thanks in advanced.