D Question 27 5.3 pts A firm can use 180 workers and 45 machines, 150 workers and 60 machines, or 210 workers and 27 machines to produce 150 desks. If each worker costs $90 and each machine is rented for $1,800, the economically efficient input combination is: 150 workers and 60 machines 180 workers and 45 machines O none of the available answers is correct O 210 workers and 27 machines