需要多支付. I did a calculation for you, need to pay around $1500,

not counting school and other educational expense yet. (Assumed you have 2000 per month income.)

https://www.cse.ca.gov/ChildSupport/cse/guidelineCalculator/processGuidelineCalculation?conv_instance=419d9e8f-a2c1-4d42-91b2-e2ec1787605d&conv_id=GuidelineCalculationConversation