In cell B13, enter a formula to calculate the amount budgeted for Airport Parking. Use the Airport Parking Daily Rate and calculate the number of total days traveling (use the # of Nights+1 in your formula) to include both the departure and return dates. For example, if a person departs on June 1 and returns on June 5, the total number of nights at a hotel is 4, but the total number of days the vehicle is parked at the airport is 5.