CSS supplemental question - noncustodial parent support

In a divorce situation, I’m the custodial parent of student, and her father and I split her expenses evenly each month (school trips, etc) in which we true up what we’ve each paid in our student’s expenses and write a check to one another. This is in addition to the small amount of court ordered support. The supplemental question asks “Enter the amount of money and support the student received from the noncustodial parent during the 2018-19 school year”, and also asks me to predict the same for the 2019-2020 school year.

Well, the student didn’t directly receive any support - the parents just paid for various things. Should I total up what the noncustodial parent paid to me, and deduct what I paid to him? Or just enter zero?

Report the court ordered child support. If he paid for piano lessons or a school trip, don’t report it.