Whatever solution you design, it should be quite robust. The data looks like it comes from a critical financial process. The data is from a Norwegian insurance company and contains details of delayed payment from customers. INKASSOVARSEL which means Collection Notice. These are sent out to customers, if they forgot or are not agreeing to pay the amount due.
The conditions you show are quite basic and easily achievable on such a small dataset.
If you do not try, you cannot learn. Show us what you have tried so far, dont just ask for completed solutions. It will not help you in the long tun.