A publishing house is using $400$ printers and $200$ printing presses to produce books. The printers' wage rate is $$20$ and the price of a printing press is $$100.$ The last printer added $20$ books to total output, while the last printing press added $50$ books to total output. The publishing house

Multiple Choice

is using the cost$-$minimizing combination of printers and printing presses.

should use more printers because they are cheaper than printing presses.

should use more printing presses because they are more productive than printers.

could produce the same number of books at a lower cost by using more printing presses and fewer printers.

could produce the same number of books at a lower cost by using more printers and fewer printing presses.