How much of a discount do manufacturers usually give to retailers. Or, in other words, how much of the actual sale price goes to the manufacturer?

Also, is anyone familiar with the process involved in having your product sold in stores such as BestBuy? Specifically, do manufacturers usually sell to a BestBuy (as an example) store initially and then expand to other stores or would they sell to BestBuy at the corporate level and let them distribute your products among their stores?

Thanks for any help.