From prune:

A difference of 24 J Class tickets @ AED 33400 return. One sector AED 16700 X 24 = AED 400,800.00.
60 Tonne difference is 48 000 liters. (SG of 0.8)
Surely Jet A1 doesn't cost AED 8.35 per liter.

Now there's a difference of 2 First Class seats granted they are probably not used, but all the same that's another AED 45430.00

Oh yes,then the cattle in the lower deck. That would be an extra 92 @ AED 6570.00 return. Thats a cool AED 302,220.00 one way.

All tolled up this is Aed 748,450.00. I'm very glad that some of my very well informed colleagues are not running this airline, as they would have you believe that we should not spend an extra 60 tonnes of gas to make that money. This weeks IATA average fuel price is $1015.50/metric tonne which would be $48,744.00 (AED179,037.70). FBO prices at $2.00/ltr would be $96000.00. (AED352 609.93)

At IATA prices (excluding hedging) the 380 makes about AED 568000.00 more money.
At FBO prices, this is reduced to AED395,000.00.

Today's flight from JFK incidentally took 8/75/377.
No difference first class.
22 Difference Bussiness (excluding 1 staff) = AED367,400.00
70 Difference economy = AED 229,950.00

TOTAL AED 597350.00

My figures are straight off the Emirates web site, I'm sure they are probably out by a bit. I'm willing to bet though that the 380 is not the money wasting beast it is made out to be.