It would probably be in your best interests to hire an attorney who practices criminal defense regularly in the court where your charge is filed, and that person will be able to give you more complete and reliable answers. However, I can tell you that in my experience in criminal defense it would be highly unusual for a person in your situation to receive any jail time, and in many cases like yours it will often be possible to enter an agreement with the prosecutor to perform community service instead of even getting a conviction on your record. My advice: don't panic, but do be proactive and either hire an attorney or immediately apply for public defense representation, and make sure you know when you have to be in court and show up on-time or early. Good luck!
If this is your first offense then your best bet would be to take advantage of your jurisdiction's Deferred Prosecution program. This would result in you performing community service, paying the court costs and community service fee, and then your charge is dismissed. There is no restitution because I assume they recovered the items at the store. I published a guide on my individual Avvo site about Deferred Prosecution in Buncombe County; I imagine that the procedure would be very similar in your county if you want to take a look at it.