Prepayment amortization

Hi

My customer would like SAP to automatically amortize prepayment balance. However, they would like to calculate amortizing amount by day for example; if they have 1,000,000 prepayment and must be amortize for 1 year, in January they would like to amortize by 1,000,000 x 31/365. Is it possible to do so? How does it work?

Second question, is there any features of SAP so that the customer can see the movement of prepayment?

Thank you