How much does it cost to take Amtrak from New York to Boston?

Excuse me, I was wondering if you could provide me with some information about the cost of traveling from New York to Boston via Amtrak. Specifically, I'm interested in knowing the approximate price range for a one-way ticket. Is there a standard fare that applies to most passengers, or are there different rates depending on factors like time of day, ticket type, or any promotions that might be running at the moment? Additionally, would you happen to know if there are any discounts available for frequent travelers or members of certain loyalty programs? Thank you in advance for your assistance.