Engine compression read out

well alrighty, i drove the car around the block a few times and got it pretty warmed up. it odviously cooled down a bit by the time i got all the spark plugs out. but the number came back the same. And i also had seen on a previous thread how you can do the dollar bill test. were you can hold a dollar bill up to the exhaust and if it wants to suck it up then it's a burnt valve. all i did was just make the dollar bill flop around, not really suck up or anything, because i gave it some slack and never wanted to be sucked away. but a buddy had mentioned it could possilbe be a flattened cam??? and another buddy said try some seafoam to see if there might be some built up carbon on that vavle?? whats your opinion? thanks everybody