There is still a lot more analysis we could do on this. For example, how long does it take you at the gym to burn off 3500 calories (one pound)? Multiply that by your billable rate (what we charge clients for our time), and you’ll figure out how much it costs you to eat regular ice cream and burn it off. Then you can decide whether it makes more sense to pay the premium for the ice cream, in order to avoid paying the opportunity cost of spending time at the gym. You could also compare that gym time to how much it costs to get liposuction and how many pounds are taken off with that to get a price per pound of not gaining the weight that way.