How to create one payment term for below 3 conditions

Hi Guru's,

I have a requirement to create one payment term for below 3 conditions.

There are 3 conditions. 1st one is met.

1. early paid 30-day prior to due date: cash discount 0.5% x early paid invoice amount.
2. early paid 11-29 day prior to due date: cash discount 0.5% x (early paid/30day) x early paid invoice amount
3. early paid 1-10 day prior to due date: no cash discount. - IF THE FIRST TWO ARE MET, IT'S NOT REQUIRED.

Thank you very much.

Regards,

Ameer