Commission Calculation based on YTD

Good Morning,

I am trying to calculate the commission pay out based on YTD percentage with the following rules.
1. Commission is calculated on YTD percentage
2. If YTD achievement is lower then 80% no commission is payed that month. If next month the percentage is higher than 80%, the sales recuperate the previous month.
3. Higher then 100% is not payed until the yearly target is achieved. And an accelerator is applied when the yearly target is achieved. The accelerator is 2% payed for 1% achieved
(ex. 102% achieved = 104% payed with a cap of 200%).

A Power BI file that looks similar of what I am working on. Click here

If someone can help me that would be awesome.

Thanks for your help