What is the Stargate cross chain fee?

Excuse me, could you please elaborate on the Stargate cross-chain fee? I'm interested in understanding the specifics of this fee, such as how it's calculated, when it's charged, and if there are any potential ways to minimize or optimize it? I'm considering using Stargate for cross-chain transactions and want to ensure I have a clear understanding of the associated costs. Thank you for your time and assistance.