Juan recently took a business trip to Argentina. Juan's business portion will consist of $4$ days. He also plans to spend $2$ days with family $($total $6$ days in Argentina$).$ Juan incurs the following costs. What can he deduct? $$4000$ round trip to Buenos Aires, $$500$ in meals during the $4$ day conference period, $$1000$ rental car expense $(6$ days$),$ no hotel charge, juan is staying with family