12. A restaurant*'s total cost for'S,``` meals served amounted to $109,0no. The manager is convinced that he can sell the meals at an average of $ 20 per meal and make a profit if his volume increases because* A. fixed costs per unit remain the same with a larger volume B. total fixed costs would be lower with a larger volume C. Variable costs per unit is lower with a larger volume D. total mixed costs remain the same with a larger volume E. none of the above