Rachel lives and works in Chicago. She is the regional sales manager for a national fast-food chain. Due to unusual developments, she is compelled to work six straight weeks in the St. Louis area. Instead of spending the weekend there, she flies home every Friday night and returns early Monday morning. The cost of coming home for the weekend approximates $500. Had she stayed in St. Louis, deductible meals and lodging would have been $600. How much, if any, may Rachel deduct as to each weekend?