Don't pay him anything.
For the last 5 car I leased, the Interest rate / Residual value / Monthly payment is LOCKED when you and the sales manager signed the offer. Thats the FINAL. It doesn't matter if the car arrive in 2 days or 2 months.
Don't let him BS you, My best guess is he didn't hit his sales this month and need to make up the story, so he can close the deal on April 30.
Total BS.
BTW........I been in Town and Country couple time and feel their sales people are
me big time.