Dunkin' Crew Member interview questions

I went in Dunkin Donuts to get a dozen donuts, there I saw an ad for wanted help for after school I'm currently in High School, so it was perfect for me! The Ad also said that "All applications without Cover Letter will not be considered." So then, I asked for an application, and went straight home, filled it out, and created a Cover Letter, which included my qualifications, experience, extracurricular activity, why I wanted to work there, volunteer and work experience, accomplishments, and contact info. (Note that I'm only 16, and a senior, so I don't have that much work experience, but believe me, it's all about your wording, and how you advertise yourself through that paper). I asked for the manager later that day, but she wasn't there so I just turned the papers in to the guy I got it from. 6 days later, I called in to check up on my application. The manager said that she hasn't called for interviews with anybody yet, she asked my available hours, and she also said that she'd note that I called. Then 5 days later, I called again to check up on my application, she basically said the same thing, and that she'll note that I called a second time. (You gotta show them that you're really interested in that job). A couple days later, she called me, asked me about my work experience, available hours again, and asked my age. I'm 16, and they usually hire 17 or older, but she said that she'll ask her boss to see what she can do. About an hour later, she called me again, this time she said to meet her at the dining section of Bashas' at 2:30 p.m. since she doesn't work at that time, she also told me to bring a copy of my State ID, and Social Security. So that's how I got my interview. The next day, I started getting ready at 1:30, I put on a Shirt and Tie, Slacks, and Dress shoes, and a little bit of cologne to make sure I looked presentable. I paper clipped the copies of my State ID and Social Security (DON'T STAPLE!!). I arrived at Bashas' at approximately 2:20 because in Interviews, 10 minutes early is what's considered "on time." When she came through the door, I greeted her with a warm smile, and a firm handshake. We both greeted each other, then I gave her the copies of my documents, and then she said: "I'm really impressed with your cover letter, you sound like a wonderful young man. So I'm gonna tell you, I'm already going to give you the job, it's yours." I was so surprised that she told me this in the very beginning of the interview, so then after that I filled out a bunch of paperwork, and chatted about the work environment, and that's that. She already had me on schedule, I start in 3 days. So my best tip is: Make an awesome Cover Letter to go with your application even if you're not required to, and call them once a week to check up on your application to show your persistence. Good Luck!!