How much you spend during your time in Washington will of course vary depending on where you live, eat, and find entertainment, but living in Washington can be expensive, particularly during the summer when you are paying for housing (semester housing in DC costs the same as on campus). The following numbers assume an eight week stay during the summer; a safe bet is around $4,500.
$2,500 (based on cost for dorm room at George Washington University)
$200 (assuming $5.00/workday for the metro)
$200 (approximate cost of a round-trip train ticket) to $600 (approximate cost of round-trip plane ticket)
$250 (assuming students will need to buy a few items of business attire)
$500 (based on Census Bureau estimate of average weekly food costs)
$500 (local tourism, entertainment, other living expenses)