Usually fabric shops tend to be super expensive but I went to a wholesale plant where you can buy at purchase cost.
So I saved a whole lot of money and got myself a nice striped sweatshirt fabric.
Also I found this red Jersey on a pile of remains, which means it couldn't be cut smaller anymore, but I got it for a good price of 7€. Remains are paid 5€ per kilogram.
And they gave me some small fabric remains for free :)