That piece of wood you threw on the fire cost 50 cents!

Early this morning I heard a weird noise out back. I asked Robin if she heard anything downstairs. She said nothing out of the ordinary. I was on my way out the door and saw a water shower going up into the air. Our line out back burst from the cold. I thought this was only supposed to happen if the Temp went under 20 degrees. Guess not. Some buddies of mine went to Coopers Gulch to hit some softballs at 9am. Not a good idea in 30 degree weather. It did not seem to affect Barry Scarpelino though, he was hitting shots over 300 feet and he is closing in on 55 years of age. Robin and I went to the gym and then to the C/R women's and men's game. Afterwards we met friends at Big Louie's to watch the Eagles and Saints. My buddy Ron is an Engineer who has to analyze many of lifes little problems. He did a cost assessment on how much it cost to actually use wood heat. He broke it down to a level of a normal piece of wood and how much that piece represents cost wise in heating a house. It came out to 50 cents! Has anyone out there heard of such cost comparisons? He explained his methodology but he was losing me quickly. Of course if it applys to his house it may be skewed. His house is well over 4,000 square ft with 9 ft picture windows over looking the bay on Humboldt Hill.