How do you calculate the maximum claimable?

Every P1.00 paid as levy up to a maximum of P1,000.00 shall generate a grant of P7.50;
Every P1.00 paid as levy in excess of P1,000.00 but below P5,000.00 shall generate a grant of P3.75;
Every P1.00 paid as levy in excess of P5,000.00 shall generate a grant of P2.00;