I have a problem calculating the effects air infiltration has on a refrigeration system.

I have 3 rooms at different temperatures all separated by a rough 7'X10' warehouse doors that are open approximately 90% of the time.. let's say 100% just for ease of calculation.

One of the room is exposed to Outside Air Temperature, the doors are closed, but have small cracks roughly 18in^2 to 36in^2 on average.

OAT = 110F
Room1 = 55F (door closed 100% with leak area ~ 18in^2 - 36in^2)
Room2 = 40F (door open 100 % with door area roughly 70ft^2)
ROom3 = 30F (door open 100% with door area roughly 70ft^2)

My question is how do I find the effect it has on the refrigeration system with all the leaks?
How do I represent this into more of a $ and kWh savings?

I know Q=U*A*dT and using the standard air infiltration equation...but i'm still at a lost.

Anyone know any good equations or calcs to use and how to approach a problem like this?