Corbel Corporation has two divisions: Division A and Division B. Last month, the company reported a contribution margin of $47,700 for Division A. Division B had a contribution margin ratio of 35% and its sales were $231,000. Net operating income for the company was $27,200 and traceable fixed expenses were $59,700. Corbel Corporation's common fixed expenses were:

Read the following paragraph, and choose the best revision for one of its sentences.dr. blake is retiring at the end of the month. there will be an unoccupied office upon his departure, and it is big in size. because every other office is occupied, we should convert dr. blake’s office into a lounge. it is absolutely essential that this issue is discussed at the next staff meeting. (a) because every other office is occupied, it’s recommended that we should convert dr. blake’s office into a lounge. (b) because every other office is filled, we should convert dr. blake’s office into a lounge.