All confused about Dunning Terms

I have gone over the training and the posts concerning the dunning terms and am a bit confused as to what to mark as to the "Effictive After" in Dunning Levels - Setup

Lets say I have an invoice with today's date March 7th and the due date is in 10 days, March 17th. What would be the Effictive Date for

Level 1 to be 10 days after March 17th

Level 2 to be 40 days after March 17th

Level 3 to be 70 days after March 17th

thx, Richard