Look, up in the sky, it’s a bird, it’s a plane ... No, it’s two planes! Two taxpayer-funded planes, that is. And on those two planes last Thursday were two occupants of 1600 Pennsylvania Ave. in Washington, jetting across country to the same destination — L.A. Separate planes. Your money. Ready for the pain? You’re going to need a No. 2 pencil and scrap paper for this. Estimates are that Air Force One costs about $206,000 per hour to operate. You could go on Priceline right now and book a round-trip itinerary from Boston to LAX for between $500 and...