If I understand your question correctly, these people are called stock clerks or grocery stokers.
Grocery store
You can call it a grocery shop/store.
Lemonade is what some people call a 'soft drink'. Any grocery store or convenience store or food retailer should have soft drinks.
call the store maybe?
Driver
Safeway is a grocery store that will be open part of the day on Christmas. You should call the store to see their exact hours for Christmas.
It is recommended to call your favorite grocery store and find out their holiday hours. If they are close for Christmas they might be nice enough to provide you with the nearest grocery store to you that will be open on Christmas day.
Yes, it frequently is. You may call the grocery store in question to verify. Do not send in any money or personal information.
Coupons printed from the internet can be a great way to save money at the grocery store. In order to find out if your local grocery stores accept internet coupons you can give them a call. You may also want to just ask the next time you are in the store.
Yes most stores offer in store coupons. You can always call before making a trip.
a supermarket or grocery store or emporium
Rev Counters, or tach-o-meter maids.