Google says a220 90 mil per unit. Alliance bought 22 F100s a few years back for 18 mil from memory.
Rumour has it VARA paid 16 for one.
I reckon the Fokker will go another 20 years. The only things that would change this would be something like a spar life limit, rising fuel costs or spare parts company closing down.
I think they’ll have the capital by then to handle the lease costs.