FUTA tax by month with salary cap

I need a little more help - you guys were so good the other day i have high expectations now.

So I am trying to figure out a month by month equation for FUTA.

FUTA would be monthly from column Z to AK.

the cap is j4
the FUTA rate is i4
We have a 4,4,5 week month for our fiscal quarter - which explains the salary equation by month

I saw other equations for FICA but with the rate possible changing I figured it just as easy to seperate out.

Thanks