Post-Gen Con Accounting (You Owe Me More Money)

I did the math and you guys each owe me a bit more money. The extra expenses were:

Parking at the hotel was $38 per night for a total of $190. 
Gas for the trip down was $41. 
Gas for the trip back was $38.

That means:

Dave - Paid $314.44 up front  and still owes me $57.75 (parking + gas down)
David - Paid $350.00 up front and still owes me $21.94 (parking + gas down)
Bruce -  Paid $350.00 up front and still owes me $93.93 (parking + gas down and back + hardcover PF2 book)

I will see Bruce tonight. Can the rest remember to bring money (or check) next week?