By that time , costs for the Mark II , now dubbed the Tigershark , had increased from $ US 185,000 expected in 1979 to $ US 305,000 .
Spitfire had a firm sale for the first production aircraft .
By that time , costs for the Mark II , now dubbed the Tigershark , had increased from $ US 185,000 expected in 1979 to $ US 305,000 but Spitfire had a firm sale for the first production aircraft .