uantity Long-Run Total Cost (Dollars) Firm 1 Firm 2 Firm 3 Firm 4 1 180 120 150 210 2 350 250 300 340 3 510 390 450 490 4 660 540 600 660 5 800 700 750 850 6 930 870 900 1,060 7 1,050 1,050 1,050 1,290 Refer to Table 13-12. Which firm has economies of scale and then diseconomies of scale as output increases from 1 to 7? Firm 1 Firm 2 Firm 3 Firm 4