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I'm sorry, I don't understand how to parse your first sentence

Excuse me, I speak Jive.

I'm boutta up that by $100/mo. =

I am about to increase that amount by $100 per month.

Surely, it's a rare occurrence to hear that reference from Airplane!.

Don't call me Shirley

Roger, Rodger.

Excellent Airplane reference.

He's saying he is about to up (or increase) that by $100/mo.