He owes you $3000, you say. Guidelines say you owe him $260 monthly for 3 years =$ 9,360, and by % reduce the 3K by 20% to $2400. Balance you owe is $7,000 and his support gets reduced.
My response:
Actually, she doesn't owe him anything. They BOTH agreed to handle it the way it is in the court order (with no child support being ordered at all). He is reneging.
You make it sound like she is in arrears when she is not. In anyway, shape or form. The father, on the other hand, IS in arrears on his financial obligations to his child.
Why am I not surprised you are defending his actions?