XYZ Company uses the high low method to analyze the mixed cost. According to the cost formula derived, the total fixed cost is $10,000. Total cost at the high level of activity was $82,000 and at the low level of activity was $25,000. If the low level of activity was 2,500 units, what was the high level of activity in units? Select one:

a. 11,000

b. 12,000

c. 11,500

d. None of the answers given

e. 8,200