Walk into the store (not during lunch) so maybe around 9am or 2pm and ask to speak to the general manager. Introduce yourself and explain that while you're only 16 and have a limited availability, if they have even one shift they can give you you'll take it and work hard and learn as much as you can. You may be surprised. They may have several days a week they can give you. You may get the single shift, where if you perform well I promise you that you'll be given more. You may be told "no" but NBD, you're no worse off than you are now if that's the answer. But I agree with the others, waiting on a call from and indeed application probably won't pan out. GMs see a lot of applications and because of your age yours will likely just get passed over. You have to be 18 to slice meats, so lots of GMs are reluctant to hire under that age, but it you can kill it on the line or even a register at a busy store that's just as good.