TVLand sells home entertainment ....

please give explanation.

TVLand sells home entertainment systems and also offers a complementary installation service. The same service is offered by other vendors for $50 on average, and TVLand typically charges approximately 40 % more than other vendors for similar services on a stand-alone basis. Using the adjusted market assessment approach, the stand-alone selling price of the installation service is: Multiple Choice O$20. $50. $70. $90