Borrowed from the Eclipse Critic comments..........
If you assume that each flight was a revenue flight (no positioning or dead head flights and no diverted flights) and each flight had 3 passengers and each passenger paid $4 per mile, you would get the absolute maximum revenue for the month.
If you assume a reasonable percentage of the flights were positioning, training, or dead head flights and each rev flight had one passenger and each passenger paid $2 per mile, then you get the lower bound on revenue for the month.
Then best case would be 3 passengers per flight x $4 per mile x 314 flight hours x 220 miles per flight hour x 100% revenue flights =$830K for the month.
The worst case would be 1 passenger per flight x $2 per mile x 314 flight hours x 220 miles per flight hour x 66% revenue flights = $92K for the month.
As with anything, the truth lies somewhere in the middle. Let's split the difference and say DayJet had $460K in revenue for the month.
According to Eclipse it costs $424.75 per hour in operating costs. That would be 314 flight hours x 424.75 = $133K in direct cost per month.
Interest expense of financing 15 aircraft would add let's say roughly another $100K per month.
If you had one and a half crews for each aircraft, that would be 45 pilots at $60K per year - works out to another $225K a month. (Likely more than 3 pilots per airframe - Ed.)
That's $458K in expenses per month vs. $460K of revenue.