Multiple independant variables in cost estimate

All,

I am working on a cost estimate and I am having trouble with some equations in my master template. I need to format the spread sheet, so that "Deployed Units" change automatically, when the following variables are changed: FY date, units deployed, and life cycle expectancy (years).

I have attached a simplified dummy book to show the results I want (highlighted in red), when I change the variables (highlighted in yellow). Please do not worry about "FY" row formatting, just the outcome of the correct deployed units.

Sorry for the ambiguous title, I wasn't sure what else to out

Thank you for your help in advance, this forum has always been extremely helpful!