What does Amazon charge me, the seller, for shipping?

Hello all I’m opening up an Amazon seller professional account and I can’t figure out what Amazon will charge me for shipping. My packages will be either 1 lb or 2 lb weight, and I’m assuming they pass along a discounted shipping rate like eBay and Etsy, both of which I have been using for years. I am trying to research this info and all I’ve really come across is there’s an average of 35% discount.

I’m doing FBM.

Thanks for any info!