I would be surprised if any of the numbers in the original post are correct.
Production cost of a B-17G in 1943:
Airframe $127,069
Engines $38,483
Propellers $11,900
Electronics $9,040
Ordnance $6,342
Miscellaneous equipment $45,495
Total: $238,329
Source: Boeing Aircraft Since 1916, Peter M. Bowers, Naval Institute Press, 1989.
Production cost of a Ju 88A-5 in 1940:
Material cost: RM 141,996
Labour cost: RM 14,998
Miscellaneous (including profit):RM 39,831
Total: RM 196,825 ($46,863 in 1940's currency conversion)
Source: Junkers Flugzeug- und Motorenwerke AG audit report 1939/40, BArch R 8135/2548.