What is the cost of FBA to US ?

I just get into the amazon seller central and I am planning to sell my products in US. But I am outside of US and thinking about using FBA program. I’ve read the amazon articles about it, I got the idea but details are not mentioned. Which parts of the process amazon handles ? How much does it cost ? Does amazon cover all the fees and you just pay amazon upfront ? These are the questions in my mind. Does anyone experience the FBA process to US ?