BeckyMc:
Can you explain how I could store the calculated field?
Not easily no. As I mentioned earlier that's difficult at the best of times. Here, as Rabbit points out, you haven't even shared any basic information we could use to start thinking about your problem.
I still believe that, far from taking a short-cut, trying to save the calculated data will be more complicated, more convoluted, and will take more time, than doing it the standard way. I may be proven wrong if/when we learn the details of exactly what it is you're actually asking about, but I very much doubt it.