On or before the first day of January of each fiscal year the Controller shall determine the annual repayment, if any, to be due from each district during the next succeeding fiscal year, as follows:
(a) If, for any grade level of a district, the amount of the eligible bonded debt service exceeds the 40-cent tax amount, no annual repayment shall be due the state from such district with respect to such grade level during the next succeeding fiscal year.
(b) If, for any grade level of a district, the 40-cent tax amount is greater than the eligible bonded debt service, the amount of such excess shall constitute the annual repayment due the state with respect to such grade level during the next succeeding fiscal year; except that if the eligible bonded debt service is less than the 10-cent tax amount, the annual repayment shall equal the 30-cent tax amount.
(c) The total repayment for each district is the sum of the annual repayments determined for each grade level of the district under this section.