Estimate from a short and long run viewpoint. 
An airline is flying among two cities.  The airline has the subsequent costs associated with the flight:
| Crew | $4000 | 
| Plane daily depreciation | $2000 | 
| Fuel | $1000 | 
| Plane daily insurance | $2000 | 
| Landing fee | $1000 | 
The airline has an average of 40 passengers paying an average of $200 for this flight.  Do you think the airline should be flying among the two cities?  Evaluate from a short-run and long-run perspective.