Panel 1: What the heck? I guess that's Mike in the car, since he has the usual, "What? Someone's not kissing my ass?" tone. And was Weed the photographer for that ad up ahead?
Panel 2: Apparently the sign is correct -- "Not responsible for anything."
Panel 3: Huh. Is this part of a larger pattern? Mike takes too much for granted, and gets ripped off? ETA: I mean, as jessb points out, he clearly does not understand how a contract works. Next thing, we'll find out his 25K advance will come from Nigeria, and he'll have to deposit the check and return the surplus.
Panel 4: I don't get it.
Panel 5: Whatever. Dunno what this strip has to do with the price of butter.