Loan Amortization Schedule Build

Understandable. PMI is Private Mortgage Insurance, basically an added cost to my monthly payment. So the template would function perfectly if I did not have to worry about PMI. But I have to pay PMI until I hit 20% of my principal loan is paid (eg. if loan was $400,000 until I had paid 20% of it ($80,000) I would have to pay PMI). So for example if my calculated monthly payment without PMI was 2000, my payment with PMI would be 2050. This $50 cost doesn't go towards principal or interest it goes to my mortgage provider. I am hoping to modify the template such that until my principal has been paid down the $80,000 my scheduled payment would be the $2050 and once that $80,000 has been hit it would shift to the $2,000. (This would be in the actual schedule not in the summary shown at the top, rather in the summary there would be another "enter value" of the cost of PMI and another "loan summary" line showing the $2,050.