The basic child support obligation derived from the child support schedule shall be divided between the parents in the same proportion as each parent’s monthly net income bears to their combined monthly net income. The monthly obligation of each parent shall be computed by multiplying each parent’s percentage of the parents’ monthly combined net income by the total monthly child support obligation. It is presumed that a parent with sole or primary physical custody of a child is contributing his or her portion of the child support obligation to meet the daily needs of the child. [Ord. 50 § 7.5(2), adopted, 3/23/2017.]