What Is a Fair Rough Pricing Be For a 18 Classroom Door Emergency Lockdown System?

What is a fair rough pricing be for a 18 classroom door emergency lockdown system? This is assuming there is drop ceiling so it is relativity easy to run wires.

Basically a system that when activated uses maglocks to lock down the 18 doors so they cant be opened until deactivated.

I am looking for a very rough price, including material and labor.

Thank you

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