My question involves criminal law for the state of: Washington

I was shopping at a grocery store and decided to eat out of the bulk bins. I wanted to try one of the candy pieces in a mix, so I put one scoop into a bag, ate the three chocolate pieces I wanted to try, and threw the rest away in the garbage can (we're talking like a few peanuts and some raisins). I purchased the rest of my groceries and was approached after leaving the store about the eaten food. I cooperated, admitted it was wrong, etc. The total charges came to be around $9.

I am from out out state and did not provided my diver's license number or SSN. The guy also didn't take my license plate because I had a rental car. I did give them a school-issued ID from Wisconsin, my phone number and address. I signed the "trespassing" paper and another one about the shoplifting and was told I would be mailed a citation to pay the $9 plus a $200 fee to the store. I'm not justifying what I did was okay. I wanted to pay the $9 right there, but $200 seems pretty steep for this 'crime.' They guy told me if I don't pay it, there will be a warrant for my arrest, but I was skeptical given that he didn't even have my driver's license number or SSN. What are your thoughts? No police, out of state, less than $10, and no driver's license, plate number or SSN on file. (They do have a photo copy of an expired school-issued ID) Is it feasible to save myself $200 and never eat out of the bins again?

Thanks a bunch in advance for your advice.