This is quite confusing, the published image was presented as Jinnah Class frigate, however ASFAT ,the shipyard states that 4 of the PN Milgem is under construction (2 in Turkey, 2 in Pakistan). So either there are total of 4 ships as Jinnah + PN Milgem ,or there is only 4 ships currently approved which is all Jinnah, which is actually PN Milgem.
Note:
Apparently, the 4 ships which is contracted for now is called PN Milgem and it is mentioned as such in documents. I was rather thinking this "PN Milgem" was the Jinnah class, but it was not.
That one Perry can be kept out of numbers (even probably themselves are not counting it
), because it is not modernized -maintained and probably lacks the critical abilities. Also Type 21's are too old and likely to retire. and 4 F-22P might go through an MLU in next decade.
If i am not mistaken the project has costed around such including ToT and IP rights, but again the cost might be excluding some systems which is going to be purchased or provided by PN itself (Chinese or Pakistani subsystems). The actual price might be lower when Pakistan desires to built further ships on their own. And if they wish the prices can be further shrunk by replacing propulsion system and some other subsystems.
My personal comment, whenever somebody insists or talks about "numbers" to show size of their fleet, i just react "mehh". The number's doesn't matter, but the capabilities and fleet command structure matters the most. So, the numbers shouldn't be the goal.
And in overall, 20 major combatant, plus 30 minor combatant is not a dream,since probably those 30 would be FAC, Corvette sized ASW -ASuW ships in range of 50-70 meters and about 600 to 1200 tons of displacement and with weaker /cheaper sensors compared to those major 20.
4 of Type-54
4 of Type-22
4 of Yarmook -even if i don't count these as major assets- *
4 of PN Milgem
4 of Jinnah Class frigate
although, these 4 ships seem to have a strengthened mast for sensors, space for a CIWS -counter measures, and 8* SSM ,may hint possible upgrades in the future.