Thanks, Jeff! This is actually the company's internal recruiter, not an external recruiter from an agency. I don't want to waste my time or theirs interviewing if the salary is far too low. It's about 50K lower than what I am asking for, so there's no point in moving forward if they are not increasing the salary. And, I figured out through ChatGPT how to approach it! I will send a second follow up letter if they want to schedule a second interview.