Coffee Klatch is an espresso stand in a downtown office building. The average selting price of a cup of coffee is $1.49 and the average variable expense per cup is $0.36. The average fixed expense per month is $1,300. An average of 2,100 cups are sold each month. What is the margin of safety expressed in cups? A. 3,250 cups B. 950 cups C. 1,150 cups D. 2,100 cups