A Hummer four-door costs $57915. A dealer has a 12.3% markup. What is the selling price of the vehicle?

For $57915 being what the dealer buys it at:

(57915) x (0.123) = 7123.545

(57915) + (7123.545) = 65038.545

For the $57915 being the final selling price:

(57915) x (0.123) = 7123.545

(57915) - (7123.545) = 50791.455