What is the most commonly used method of computing overhead in domestic production and drilling operations?

a. Only actual indirect costs may be charged.

b. The percentage basis where overhead is computed by taking a flat percentage

(e.g., 5%) of direct charges actually incurred is used.

c. The percentage basis where overhead is computed on a percentage basis using a sliding scale is used.

d. The combined fixed rate basis is used.

e. None of these applies.