Choose the correct answer. you see a used car you wish to buy. the dealer quotes you a price of $9,550. you have a blue book quotation of $8,400 for the same model and year. how much markup on cost is the dealer using? it is %.

The blue book has many prices in it. The one described here is not described as "cost", so it appears there is insufficient information.

If we assume the dealer's cost is $8400, then the markup is
.. (9550 -8400)/8400 * 100% ≈ 13.7%