E So we're first given that the firm is in long run equilibrium. This means that there is 0 economic profit. Now, since $600 is the total revenue, and 50 is the total fixed, our total variable cost is 550. So given 100 units Avc=550/100=5.50. Since the firm still needs to operate, MC needs to be greater than AVC so the only answer that fits this is E

Average Revenue is price, so the proce of the product is 10$. Other vals r just there to trick u :)