How do I calculate ship supply usage?

[MegaTrain]

I'd like my ship to be able to roam across the entire universe, tell me if this will work:

Cruiser class
6 of my best engines (10 supply each)
Solar Sail III
Cloaking Device II (100 supply)
4 x Solar Collector III (+600 per turn)
Repair II
Plenty of Armor & Shields
Emergency Supply unit

So at 6 engines x 7 movement x 10 each = 420 resource usage per turn, + 100 (cloak) = 520.

So with 4 collectors @ 150 each, 600 per turn should keep me full as long as I'm in a system with a sun. If not, go as long as I can and then bust an Emergency supply unit and repair it on-board! (I think this Last technique will be eliminated with the next patch)

Only problem I can foresee would be if it calculated 6 Eng x 10 each x 10 movement (includes sail) = 600 + 100 = 700 (too much!)
Can anyone verify whether the sail uses extra resources (I know its not supposed to...)