Who can write a formula or make a graph chart to calculate the half lives of Iodine and Cesium isotopes, taking into account the number of days, the range of normal to 100 thousand time above normal, the concentration of a specific radioactivity by cows in milk (700 times) what about cheese?, leaf veggies, root veggies, apples etc

Maybe a slide rule is the tool for this but I am thinking about a simple to use functioning calculator for people to calculate particular exposure in foods, air water and over time.

The EPA monitoring stations and accureate info from Japan is essential.

Do you think this would be of any value for parents or are there just too many variables to calculate anything meaningful?