Nobody knows
According to one guy from Serbian forum, total worth of a deal between Bangladesh and Serbia is 110 000 000 $ Is that true, i really have no idea. But if it is, you need to know that we regularly sell around 5 000 000 $, worth equipment to Bangladesh every year. And you also bought BOV M11, probably some ammo for Nora's, and then there is training, and maintenance.... So even if it's true it's hard to tell how much from that sum is for Nora B 52. If i had to guess i would say that Nora B 52 for Bangladesh is around 2-3 000 000$