It is hard to calculate this, but considering a US$400K project cost where 80% of the cost was coding ($320K) and considering a very modest 15% increase in learning/productivity over the main competitor (PHP), you can easily get to US$48K which pays for the developers' tool (CFBuilder) plus training and support, and even the software (3 x US$8.499/2 CPU servers).

It was not determined.

I believe that developing with ColdFusion saved me about 25% time compared to Java and PHP projects. ColdFusion has a lot of useful built-in functions that the others lack by default. Although via scripts created by others you will still be able to implemented those.

We have seen ROI with the use of the tool.