Final answer:
The markup on the automobile DVD system sold at a retail price of $879.99, when the wholesale price is $497, is $382.99 (option a).
Step-by-step explanation:
The student has asked to calculate the markup on an automobile DVD system. The wholesale price of the system is $497, and it sells to customers for $879.99. To find the markup, we subtract the wholesale price from the retail price:
Markup = Retail Price - Wholesale Price
Markup = $879.99 - $497
Markup = $382.99
Therefore, the correct answer is (a) $382.99.