Sure. Thanks for clarifying but I didn't take it as any sort of attack or anything. I figure that as long as I capture whatever it is that I spend commuting that I WOULD NOT HAVE driving that is a cost. That's the easy part and includes the Cliff Bars or the beans grown in the intestines of a Yak in some mountain, etc. However a rack for the rear of my bike to hold a change of clothing and shower junk IS included. The hard part is the actual cost of driving to work. I'm going to keep it simple yet look for ways to be as complete as possible. A round figure per mile is in line with my "simple" approach.... I just have to find a realistic figure. For now I'll use the one I came up with and then improve it as I move forward.