I bike a lot and I don't notice that I really eat more on days when I bike. And if I do it just means that I eat a slightly bigger portion of whatever I was eat

I bike a lot and I don't notice that I really eat more on days when I bike. And if I do it just means that I eat a slightly bigger portion of whatever I was eating anyway so the cost difference is negligible. Also the price of gas is relatively fixed whereas with food you can economize by eating ramen instead of steak.