It is known that the calorie of a bowl of noodles (100g) is 280 calories, that of a potato is 93 calories, and that of 100g of beef is 125 calories. A serving of potato and beef noodles needs about100g of noodles, a small potato and 50g of beef.

A: A bowl of potato and beef noodles has about 435.5 calories.

Personal calculation, just looking around, is not true.