I've attached the processor worksheet (Excel) I've set up in case your interested.
It's nothing really and simple. It's Massive (or mfr) dev time and notes and also a col that will minus 20pct and give total time when using a processor. You can simply change that rule to what ever time, i.e., 15 pct, you wish.
Just for notes... if anyone has any improvements, bring her on. I'd love to see a living document being built for notes.

I would have liked this in the massive dev chart as a pull down option.