How much does yearn cost?

Excuse me, could you please clarify the cost you're referring to when you ask "How much does yearn cost?"? Are you referring to the cost of purchasing a certain amount of Yearn.finance (YFI) tokens on a cryptocurrency exchange? Or are you inquiring about the potential fees associated with using the Yearn.finance platform? Additionally, it's important to note that cryptocurrency prices are highly volatile, so the cost of YFI tokens can fluctuate significantly over time.