Fence Climbing

Question
I recently got a dog from a local rescue shelter that they say is part Mastiff and part Boxer.  I have a 6' wooden privacy fence that he can jump high enough to get his front paws on the top and use his back paws to climb the rest of the way. I purchased an in-ground radio fence, but haven't installed it yet.  I have roughly 200 ft. of fence, is there a cheaper way to keep him from climbing out?

Answer
Sometimes putting chainlink fence that is angled inwards(like a roof) will stop a dog from climbing out,but for a while watch him just to be on the safe side,although this does often work well and will sometimes even keep cats from climbing a fence-it is worth a try and will save you some money