 In 1945 , a B @-@ 29 bomber cost $ 782 @,@ 000 . It cost $ 32 @,@ 000 to upgrade an aircraft to Silverplate configuration , so the total cost of a Silverplate bomber was $ 814 @,@ 000 . The total cost of the 65 wartime Silverplate B @-@ 29s was therefore $ 53 million . Adding $ 7 million for logistics , this put the estimated cost of the Silverplate project at around $ 60 million . 
