I don't understand the reason for which my answer is incorrect ( i attach it below )

If my units of the psychotropic drug YouWho are manufactured per day, this incurs total costs T'C; given a daily output of my units (my > m, ), the resulting total costs will be TC2. Some of these total costs are so-called fixed costs (FC) that are not connected to the produced quantity (e.g., building rentals). The other share of total costs - the variable costs - is proportional to the respectively produced quantity. Which of the following formulas for calculating the variable costs per unit (VCu) can be derived from this information? VCU = TC + TC1 ma + my VCU = TC, + TC1 ma + ml VCu = T ma - m1 VCU = TC2 - TCI TC . TC To = Fc t Vei M Veu = K Vaz= m zk To2= Fc t m z K FC = T c - mik Tci - mck = cat mm F c = TO 2 - m z k K = T C 2 - J C M 2 - m BUT The ANsureHis