Creating an instant quote form

I'm working for a t-shirt shop, and I'm hoping to use Gravity Forms to create an estimation tool for giving people instant quotes. Is there a way to do this? Please see this site for an example:

I'm hoping that I can add in things like a screen set up charge, cost for print and things of that nature that are all affected by our price breaks per quantity, as well as adding in our cost for shirts to the entire deal to give the client their total estimated cost within seconds. Please let me know if there's an extension or way to do this.

Thanks!