Excluding primers, the cost of those is about $0.8 - $2 per reaction, depending on how you do things.
Provided you have a PCR machine, a small centrifuge and an apparatus to run DNA gels an experiment like the one they are mentioning (finding out the kind of tree you have in the backyard) would cost you something like $50-$100 if you really know what you are doing. Much more if you are not a pro.
Provided you have a PCR machine, a small centrifuge and an apparatus to run DNA gels an experiment like the one they are mentioning (finding out the kind of tree you have in the backyard) would cost you something like $50-$100 if you really know what you are doing. Much more if you are not a pro.