My MSRP equation.

I use this calculation. I think it's close to reality for marketing and warranty cost and R&D expenses.
MSRP = (Total Cost + ( Prod Units * 20 )) * 1.25
Multilply by 1.4 for tax include price.
I based my equation on 325 production units car. So highly P-U cars are most expensive and lower are less.
For comparaison in this table.
Prod Unit = (( 41400 \1.4) -23100) \20 = 325 PU
MSRP = (Total Cost + ( Prod Units * 20 )) * 1.25
Multilply by 1.4 for tax include price.
I based my equation on 325 production units car. So highly P-U cars are most expensive and lower are less.
For comparaison in this table.
Prod Unit = (( 41400 \1.4) -23100) \20 = 325 PU