Not the tallest. According to relevant information, it is probably 10 yuan. Cod steak is the key. Clean cod, drain, peel and bone, and chop into minced meat. Put the minced cod into a container and stir it in one direction with chopsticks; Put a proper amount of cod meat stuffing on the plastic wrap and spread it into patties slightly larger than bread; Carefully put it into the oil pan, the oil temperature is controlled at about 170 degrees, and the cod meat is easy to cook. Fry both sides until golden. The cost of McDonald's cod fort is not the highest, but the cost of double beef burger is 18 yuan, which is the highest.