In each succeeding fiscal year the redemptioner shall pay, before the delinquency date of the last installment of current taxes, the sum of the following: (

a) That amount which is computed to be not less than the difference between the amounts previously paid under the provisions of this article, excepting amounts paid as interest, and (1) 40 percent of the redemption amount when the payment is made during or prior to the first fiscal year following the year in which election was made to pay delinquent taxes in installments. (2) 60 percent of the redemption amount when the payment is made during or prior to the second fiscal year following the year in which election was made to pay delinquent taxes in installments. (3) 80 percent of the redemption amount when the payment is made during or prior to the third fiscal year following the year in which election was made to pay delinquent taxes in installments. (4) 100 percent of the redemption amount when the payment is made during or prior to the fourth fiscal year following the year in which election was made to pay delinquent taxes in installments. (

b) On parcels tax defaulted prior to June 15, 1974, interest shall be computed at the rate of percent per month accruing on the first day of each month following the preceding payment, on the balance of the redemption amount. (

c) On parcels tax defaulted on and after June 15, 1974, interest shall be computed at the rate of percent per month accruing on the first day of each month following the preceding payment, on the balance of the redemption amount. (

d) On parcels tax defaulted on and after June 15, 1982, interest shall be computed at the rate of 1 percent per month accruing on the first day of each month following the preceding payment, on the balance of the redemption amount. Payments made under this

section shall be computed and paid in the same manner as a redemption, and the receipts for those payments shall show that the payments are for the use of the real estate under this plan for payment of delinquent taxes in installments.