Answer:
The sales price of the camera is $181.49
Explanation:
As given in the question, a camera originally costing $199.99, is marked down by $18.50. We can simplify this as :
Sales price of the camera = Original price of the camera - Markdown price 
Sales price of the camera = 
 = $ 181.49
 = $ 181.49 
Therefore, the sales price of the camera is $181.49.