I round up to the nearest dollar, and sorry in advance if the math doesnt add up perfectly.
Wow. Where to begin.
You did not explain and lay out most of your assumptions, so I am assuming you are either paying him for a 40 hour work week OR for every minute and second of every day, whether sleeping, vacation, etc. Since you did not specify, and you're clearly wrong either way, here goes.
There are 31,536,000 seconds in a standard calendar year of 365 days. So, $3.8m would be a smidge over 12 cents per second.
In a 2000 hour work year (figuring a 40 hour week, 50 weeks out of the year, 2 weeks vacation - and yes, I know that football coaches average 50 to 60 or even more hours per week) - then you're talking 7.2 million work seconds. This is over 52 cents per work second.
I did not calculate any of your other errors because it would be a continuing waste of time.
Please keep studying. Please do not design any device I may use in the future that may kill me or any mode of tranportation for me or my family. Likewise for any buildings I may live or work in.
ETA: I see you changed your per second from 1 cent to "a little over" 10 cents. Despite that being still 20 percent off, you're back in the ballpark. Many of your other 24/7 numbers appear to be accurate, by the way. Sorry for being harsh.
This post was edited on 10/4 at 1:49 pm