One commuter drove a Civic hybrid each day to work (10 trips under fuel-efficient car). Two of those days he carpooled (4 trips under 2 person carpool) and three of those days he rode by himself (6 trips under single occupancy). My total max theoretical trips is 250 but with the hybrid figured in, I have 260 data entries and am getting a warning message in the table. How do I count the hybrid car AND the carpooling?