steel: iron buyer, iron foundry, coal, steel foundry
(+ (+ 4 4) 8 (+ 2 2) 9)
29
electronics: oil, gas, coal, plastic, silicon, electronics
(+ (+ 3 3) 2 2 (+ 6 6) 2 (+ 4 4))
32
guns: steel, explosives, bullets, guns
(+ (* .5 29) (+ 2 2) (+ 1 1) 6)
(/ 24 26.5)
0.9056603773584906
engines: steel, electronics, aluminum, engines
(+ (* .5 29) 32 (* .5 4) 12)
(/ 20 60.5)
0.3305785123966942
rockets: electronics, engines, explosives, warheads, aluminum, hulls, assembler
(+ 32 60.5 (+ 2 2 2 2) (+ 6 6) (* .5 4) (+ 6 6) 4)
(/ 32 130.5)
0.24521072796934865
tanks: steel, electronics, aluminum, hull, steel, guns, turret, engines, assembler
(+ (* .25 29) 32 (* .25 4) 15 (* .25 29) 26.5 6 60.5 8)
(/ 42 163.5)
0.25688073394495414