How to set up Payment Conditions, changing the due date

I need to create a payment condition for simple and installment payments, so that when the invoice is due on the 1st of the month, the system changes it to the 30th, for example.

Below are the changes to the days that I need to make.

Day	Change to New Day
1	30
2	30
3	5
4	5
5	5
6	5
7	5
8	10
9	10
10	10
11	10
12	10
13	15
14	15
15	15
16	15
17	15
18	20
19	20
20	20
21	20
22	20
23	25
24	25
25	25
26	25
27	25
28	30
29	30
30	30
31	30

What settings for Advanced Conditions can I use? I've tried a few, without success.

Thanks