My grandparents are extremely frugal. For a lot of things this makes sense, but one rule seems pretty ridiculous to me. They want me to make sure that if I put several things in the fridge, I put them in at the same time, even if it means leaving the jelly out for a few minutes.
I'm curious to see if this makes enough sense to follow. If I open the fridge for ten seconds, how much does it cost?
Assume average cost per kilowatt hour, and an average sized refrigerator.
Submitted July 24, 2017 at 04:35AM by Ajreil http://ift.tt/2vzv12O theydidthemath
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