I doubt it would be much cheaper than the parts would be individually... But packs usually do come at a discount and they have to have some incentive since this pack includes at least one thing most people wouldn't buy individually.
I mean, how many people will use everything in this pack on a single character? The fact that you have to get it as a bundle suggests they're trying to get people who might ordinarily buy one or two elements to buy everything... but, on the flipside, if the target market is people who'd ordinarily not be interested in everything, you're looking at a discount.
Also, Mirror Enterprise uniforms are basically a quick retexture, a separate patch, a belt, and different rank insignia. Same pants/boots and 90% the same shirt except for women.
Maybe as low as 1360. No way is it a hare over 1500 unless there's something beyond the costumes and ship that we don't know about yet like a full set of projectile weapons for an away team and a scaling grappling hook.
1580 total. 800 for NX; 280 for uniforms (as they come in male and female forms)
I doubt it's going to be that much. Remember this is a bundle pack. Those are, in any business that makes sense, a deal to the consumer rather than you get everything, I just charge you full price for it in one lump sum. The other point to make out is that it is always cheaper to buy in bulk.