kwh cost simple program

well ive been lurking on this forum for four years now.
I have never shared a grow or a bud i haven't shared anything at all but that's all about to change i am starting my very first indoor grow but that is for another thread.
well on my indoor planning process i noticed no one had a set program to calculate the kwh cost per hour day year etc so i made this very simple program to kinda help out a lil.

http://www.MegaShare.com/3651261

peace.

is this assuming a 24 hour lights on period?

yeah but im gonna change the math to just have the user imput hours might even go deeper in the coding i made this in like 2 minutes at 3 am i have it set up so you enter the wattage and the kwh and recieve amount of kwh actually used an hour and the costs