the way you had it , =A1-A2*.75
A2 was being multiplied by .75 then subtracted from a1. you were wanting to subtract the two column values and multiply the difference by 0.75.
Excel is a little different. I use it with my weather history calculations.
Attached is image of Finished product. I set it up so I just have to enter price on bottom of the page for the correct month (still trying to find a page that I can hyperlink to so it does it automatically for me) :oops:
Oh no, it’s not that easy, that “-1.668” at the end is supposed to be a power, not a subtraction, according to the original source quoted on that “other” forum where Axelvold found this. See http://www.survivaltopics.com/survival/the-wind-chill-factor/
Ft = ((-24.5 x ((0.667 x V10) + 4.8 )) + 2111) x (-4.8 - Tair)-1.668