Here's a great spreadsheet that'll do the math for you. Remember to take out the TDA ( Toyota Dealer Advertising ) and Whsl. Financial Reserve which, when I buy, I will not be paying. Bware that these are IN the dealer's invoice price if you look at the 'Inventory Detail' sheets.
Well I can't upload an excel spreadsheet but here's the link to it.
new car prices, dealer scams, negotiating, dealer invoice price, Car buying tips
Scroll down about a third of the page.