Just for fun (I teach CS), I made a little program in scratch that you can calculate the average amount of rolls you can get out of a given resource (e.g. food, water, power). The link to it is Scratch QuickDice
for anyone who wants to play with it. For those just looking for the numbers. Having 6 of a resource equates to 14 rolls on average before depletion, 5 resource equates to 13, 4 resource equates to 12, 3 resource equates to 11, 2 resource equates to 9 and 1 resource (naturally) equates to 6. Feel free to play and modify. As a GM, it is always helpful to know that you can use the motion tracker 14 times before it dies on you.