How much will cost to CNC this plate see attachment?
My guess 70€.
I haven't a clue, I haven't had to get anything made externally in so long that I've no idea bout current pricing. Assuming that this is in a fully-fledged CAD/CAM package you can get quotes from some of the automated one-off/small run CNC services just from uploaded drawings/models.
P.S. Looking at the drawing, if one had to manufacture the part just from that drawing there are quite a few questions that would have to be asked. I suggest that you turn on dimensioning for almost everything (e.g. you've got a lot of holes without callouts), add some tolerances, and have a think about where your datum(s) are, and how you call off dimensions from them. I'm sure it's all 'in there' somewhere, it's just nice to have it out on the drawing in explicit and, if possible, standard form.