cost/price of part or component

hello

I created some part, then I created assembly but now I need to calculate a cost of this assembly (product), price for part separately and final price. Some parts have unit price but some have calculated price by used material. I m looking for some tutorial or some help but I cant find some information how to set a price/cost of some parts. Please help me, how can I do this.

Thank you so much

SolidworksParts And Features