Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
The New iPad / iPad 3 Costs Approximately $310 To Make –
UBM TechInsights has already done a preliminary breakdown of the recently announced new iPad’s. The reports says that to manufacture the new iPad 16GB Wifi + 4g it costs Apple around $310 this means that Apple are making a 51% margin. The $310 does not include the research , product development , software and also advertising.