The revenue is the cost of television × number of televisions sold. You need the information from the graph only for the television that costs 3,500 and for the television that costs 1,000 dollars in order to determine how much more revenue the 3,500 television produced. There were 150 of the 3,500 televisions sold, for a revenue of 525,000. There were 250 of the 1,000 televisions sold, for a revenue of 250,000 dollars . The difference between the two is 525,000−250,00=275,000dollars, which is (C).