A380 development costs were expected to be about $12 billion.
Extra costs were incurred trying to trim its weight. Development cost rose to a reported $14 billion IIRC.
Then the wiring problem came up.
Any guesses as to how much will be spent on development in total including penalty payments to customers/giving special prices on other Airbus products by way of compensation and the extra cost of financing debt with no positive cashflow? $18 billion would represent about a 50% increase. Could it rise beyond this to $20 billion or more?