Answer:
B) $2,86
Explanation:
Using the high-low method we will use the highest activity level and the lowest activity level to determine the variable and fixed portion of the costs.
Highest activity - Cost $ 14182 Â Hours - 4200
Lowest activity - Cost $ (8748) Â Hours - (2300)
Difference     -       $ 5434         1900
Now we determine the variable portion. 5434/1900 = 2,86
Thus the answer is B.