<Tr> <Th> Produced </Th> <Td> 2007--present </Td> </Tr> <Tr> <Th> Number built </Th> <Td> 636 as of December 2017 </Td> </Tr> <Tr> <Th> Program cost </Th> <Td> US $32 billion (Boeing's expenditure as of 2011) </Td> </Tr> <Tr> <Th> Unit cost </Th> <Td> (2018 US $million) - 8: 239.0, - 9: 281.6, - 10: 325.8 </Td> </Tr>

What is the cost of a boeing dreamliner