Invoice on 991
 

have seen this regarding the 991 "S"

2012 Porsche 911 2dr The New Cpe Carrera S
Invoice MSRP
Base $86,580 $96,400
Options $0 $0
Destination $950 $950
Total $87,530 $97,350 *

(basically 10% minus 180$)

anyone have the number for the 82,100 base 911? (math would say: 73,890 but im curious on exact number)

If I understand correctly you're saying the markup on a 991 S is 10% (actually 11.2%, but close enough). Don't see based on that assumption, though, how you figure the math shows that the invoice for a base 991 is $78,808. If the base is marked up the same as the S, then with a list of $82,100, invoice on the base car should be about $73,300.

Edit: Just looked it up on Edmunds.com. Invoice for the base 991 is $73,890.

Edit again: I see you changed numbers in your original post so that your "math" exactly equaled the number I provided for you. You're welcome.... ;)