Is there a way to score each individual match of a drag and drop?

So, I needed to allow users to drop the correct items onto the drop targets without an order. I also needed to award partial credit for each drop correct. By looking at this thread plus another I was able to create a relatively simple solution for both using the pick 1 freeform.

Each object has a trigger for drop correct or drop incorrect and a trigger adding 1 to an overall variable whenever a drop correct occurs. The buttons off screen are triggered to be selected based on the variable, and the different buttons are given scoring values in the form view.

Anyway, here's the sample, it's one question from a larger test. I removed the correct/incorrect layer in the actual test.