Adding values with drag and drop

Is it possible in Captivate to assign number values to drag and drop sources, then create a target that has a set capacity. The target would accept any combination of sources, as long as the sum of the source values is equal to or less than the target's capacity?

Here's an example:

Source A - 1 point

Source B - 2 points

Source C - 3 points

Target X - capacity of 5

Acceptable answers for Target X include (but aren't limited to)

5 Source A's

2 Source B's and a Source A

1 Source C

As it stands, I'll be building the targets to accept multiple combinations as correct, I was just wondering if things could be built to automatically determine correct/incorrect this way.