I suppose the UK could have swapped the upholder subs for rifles
I thought that as well - the British produced I think it was 320,000 L85A1s and 30,000 L86A1s
Not sure of the cost per unit but Upholder
total cost is about $600,000,000 US dollars in 1992 exchange rate - so I am not sure how many C7A1 rifles that would buy?
Individual cost of a
L85A2 in 2017 is listed as £1000 (interestingly with all the extra equipment, Elcan sight and magazines etc its as high as £4000 per rifle!) - the actual cost per rifle as built back in the late 80s early 90s is withheld!
So lets say in 1985 - the Sub (still building at this point) is costed at $600 million USD and 320,000 C7A1 are (lets say $1000 USD each - so $320 Million)
Perhaps add in 30,000 C9s - say $2000 each (total guess) - so another 60 million
So we are in the correct ball park!