Calculating $EV on pushing over raises?

[Acey]

Hey everyone.

I dont feel like buying sngwiz so i need to learn how to calculate when to push over peoples raises by hand.

Right now im only pushing over with like AK and JJ+, and im probably missing alot of +Ev because people raise pretty light sometimes.

So basically how can i calculate this by hand?

Lets say in the 50/100 blind 9 people have 1500 chips each and MP raises 3xbb with 55+ A8s+ AJ+, he will only call a push by me with TT+ AQ+ though.

Pls show your calculations.
Thanx!