Hi. When I receive an interview invitation, what is the longest time I can wait after receiving my letter before responding (assuming the letter doesn't give a time limit)? As long as it's two weeks before my scheduled interview, it's okay right? I'm asking this question because I'm still waiting for one school's interview decision. I want to do two schools at the same time so I can save time and airfare. Am I making a big mistake and does this count against me?