How much cash do you generally have on you, and why do you have that amount?

I’m interested in people’s explanations for the amount of cash they generally carry around. Personally, I hate cash and wish I could pay for everything electronically. This day may be coming. But I tend to get money in one hundred dollar chunks from the cash machine, and that seems to be enough to last a week and sometimes two. I use it mostly for food and various sundries. The major food expense is every Saturday at the Farmer’s Market. They don’t take anything but cash.