At its current​ short-run level of​ production, a​ firm's average variable costs equal ​$25 per​ unit, and its average fixed costs equal ​$10 per unit. Its total costs at this production level equal ​$2,100. What is the​ firm's current output​ level? nothing units. What are its total variable costs at this output​ level? ​$ nothing. What are its total fixed​ costs? ​$ nothing.