Often different genes can interact in a way that influences the same trait. In the Blue-eyed Mary (Omphalodes verna), for example, there exists a gene with alleles that determine the color of flowers: blue or magenta. Another gene, however, controls whether the flowers have color at all or are white.
The regular price of buying miles from American is about 3.17 cents per mile ($29.50 per 1,000 miles plus a 7.5% Federal Excise Tax) â before a $30 Processing Charge per purchase â but with the maximum bonus offer, itâll actually drop your price down to just 2.02 cents per mile!
However, we're still left with figuring the cost of the 5.5 gallons of jet fuel, and that again depends on what price the operator is able to buy the fuel at. Today's fuel prices, depending on where and when it was purchased, can range from $3.50 to $5.50 per gallon and more.So, if we guess at an average of $5 per gallon, we get a cost for fuel of $27.50 per mile.This is a very rough figure for fuel costs only, and doesn't include any of the many other costs associated with operating the aircraft.Hope that helps some... 15 people found this useful.   To give you a rough idea, however, we can look at fuel cost per mile for a 747-400 Freighter. Average fuel usage is around 3,200 gph and it cruises at around 585 mph, so a rough average fuel usage for a 747 would work out to around 5.5 gallons per mile.