If cutting it down three degrees would cut the use by ten minutes an hour (which was the example) for eight hours (work) but it would take you say, three times (which makes sense because if you set it to 70 and it drops to 69 and it takes a certain number of minutes to get back to seventy than dropping it even more degrees is simply multiplication), the effort to get it back where you want it when you return you go from:
20/hr * 24 = 480 minutes
to
10/hr * 8 + 60/hr * 1 + 20/hr * 15 = 440 minutes
a day. Pretty simple. Obviously the math is basic at best but the principle is pretty clear.
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I ****ing love to cuddle.
I'm being oppressed!