Excel formula for calculating payout under different slabs using logic formula

Hi,

I have to calculate payout under different slabs using logic formula.

How can I do it.

Like if disbursement is 0- 25 Cr =first disb*1%

        If between 25-50 Cr = Second Disb*1.10% + all Disb* 1.%

What should be the formula here.