Answer
Dealer's cost = $499
Step-by-step explanation
The markup percent is given as
Markup percent = 10%
Selling Price = 548.90 dollars
Cost = ?
0.1 (Cost) + Cost = 548.90
1.1 (Cost) = 548.90
Divide both sides by 1.1
Cost = (548.90/1.1)
Cost = 499 dollars
Hope this Helps!!!