I was wondering if I could get some advice/examples.

I have a dataset that contains production information for every week of the year. I need to display this weekly information to the screen. The user, can then change what is displayed and based on this input I recalculate the information for that week.

The kicker is, I dont want to write anything to the database. Its more like a sandbox for the users to test various scenarios. How can I let the user manipulate data, preform calculations based on the manipulate data, but not actually write anything to the database?