(Gyudontaro cut the price of the regular size from 250 yen to 200 yen and Tatsuya cut the price of the regular size from 400 yen to 300 yen, then to 250 yen, and then to 200 yen)
（牛丼太郎並盛250円→200円、たつや並盛400円→300円→250円→200円）