Hi, can someone tell me how the damage calculation works on this game ?

let's say for example i do an atk that deals both TAI & NN damage at the same time and my TAI is like 1k while my NN is 2k what would be the damage i do to the opponent ?

A: 1k + 2k = 3k total damage.

B: (1k + 2k) / 2 = 1k5 total damage.

C: 2k total damage (supposing only the highest atk of the two will count).

D: something else you are about to teach me.

Note: i'm not adding opponent defense or any other stuff, just want to know in general what would be the main source of damage in case of TAI & NN mixed atks.

Thanks in advance and sorry if the question was been asked before.