SPOILER
Nope, you got the DOB part wrong.
3YY + 2MM + 1DD is = 01 (Miglena's year) + 04 (Katlina's month) + 24 (Stefania'day) = 28
The order for DOB is in the subjects missing posters, see if you can see now :)
T9(T3-T2) = 38(39-34)=190 Which you did correctly!
28 x 190 = 5320
Huge apologies for the confusing puzzle, I'll be updating it in the updated game version and make it easier to avoid confusions.