问题：A petfood company incurred the following costs last year for each of its three different markets:
　　                                                          $
　　Dog food                                 1,345,000
　　Cat food                                   2,300,000
　　Food supplements                 985,000
　　If a pie chart were used to represent the proportion of costs incurred by each area, what would be the angle of the section representing cat food?
　　A. 179 degrees
　　B. 77 degrees
　　C. 120 degrees
　　D. 106 degrees
　　答案：The correct answer is: 179 degrees.
　　Total costs are $4,630,000
　　Cat food = 2,300,000/4,630,000 x 360 = 179