Answer:
D)$2,033 F
Step-by-step explanation:
The formula for perating costs is:

Where 'F' is the number of flights and 'P' is the number of passengers.
If the company expected 73 flights and 223 passengers, expected costs were:

If the company had an activity of 72 flights and 228 passengers, the actual costs were:

The operating cost variance is:

Since actual costs are lower than expected costs, the variance is favorable. Therefore, the answer is D)$2,033 F.