As Pure appear to charge €4.00 for the statins what price are you paying for yours? Rosuvastatin appears to be the general one these days and I don't think there is any difference in the price if you get 10mg or 20mg.
There are several different types of statin and I take two (they also come as a single combined tablet but that's much more expensive everywhere) but I don't want to get into more detail for fear of breaching the no medical issues posting guideline. I know that mine are cheapest from CW.
Pure put up a lot of prices a few months ago, I was also paying €4 for 28 Atorvastatin, they are now €5.
I don’t have a local Chemist Warehouse, if their price list below is up to date, all doses of Atorvastatin are only €3.49 there.