We are Boston hounds leaving for Paris on Wednesday for 3 days, and would appreciate budget eating suggestions. We are staying in the 8th arrondissement, but are willing to hop on the metro for the outer neighborhoods if it means affordable chow. Budget would mean no more than $50/person for dinner, and cheaper would be even better. (We'll splurge one night, don't worry!) We are open to non-French food. Merci beaucoup!