$60 for a 10 pack. P.T. Barnum was off by a couple decimal places. These are the same people that bought gas pills that were "green" when gas was $3.50 a gallon. I knew they were horseshit from the beginning. But reading the instructions pretty much confirmed that. You were supposed to use like 4 for the 1st tank then 3 for the second and 2 for any tanks after that. But wait if you missed a tank you have to start all over. LOL. I saw some old guy trying to put some in his tank with a funnel. They would have fit but there was a little lip on the inside of the funnel he didn't notice so they slid all the way down then stopped at the end. He was beating it against the side of the gas pump trying to get them out. I was laughing my ass off. Later some University tested them and said they were almost 100% napthalene so much for being green. LOL.