interesting exercise to do for a theoretical 300k units...

interesting exercise to do for a theoretical 300k units view
Agree with DAK on those other income extrapolations
I also think you've way underestimated the corp & admin... normally I see the SGA remain as a roughly similiar % of total sales, some savings might be expected but with wage increase, general back-office growth to support these higher units I'd be incredibly surprised if you reduce your corp & admin to 1.2% sales from current average run rate of ~5.5%
I would also expect to see a higher provision for bad debts, say around ~1% sales (this is accounting provision not necessarily cost mind)

The biggest assumption is of course whether the 300k units is realistic; to be seen if management can deliver or even get close