我從來沒有想到會碰到這樣的事

1. find a local Reputable middle person such as a church father, lawyer, local official and meet with the store representative, ask how much they want to settle this case out of court, i guess under $1000 will be a reasonable request. for exchange, you request 1)withdraw the case. you also want offer that you will sign an agreement that he never enter the store and the whole chain of the store again except get the store's prior permission.

2. this is a very small case even if u go to court. you just need show the price of so called $400 item(s) at several other stores at price of $40 - $100. also included the price of the item(s) at this store price. the store over expressed the price. the punishments are:
pay fine
protection order (can not enter that store and the whole chain of that store)
(no prison time at all)
maybe: probation

3 when u are in public, this is the biggest case around u
but when u enter the court, sit there listen other's case while waiting your turn, you will realize that you just have a small case.

4. theft is very small case but is very hard punished and also you will not get any sympathy from Americans