calories we need every day...

Last Saturday, my family went out for dinner with my dad's friends. We went to a korean BBQ restaurant, and the foods there are so good so my mom ate a little bit too much.After we got home, my mom asked me she is going to start dieting because she gained some weight in pased 3 weeks. I searched about how much calories do we need each day online to help my mom to diet.And I realized that generally a person who do house works need intake calories around 2000 to 2200.By subtracting 500 calories from your daily intake value you will lose around 1 pound per week. This is based on the fact that one pound of fat is equal to 3500 calories, and 7 days worth of 500 calories = 3500 calories. That help a lot to my mom on her way of dieting, and also she told me to find some foods that have a lot of proteins in to to make her fill full but with less calories.　I told her that eating apples are very helpful to lose weight.Because I heard that an apple is worth 50 calories and to digest it you need 75 calories, and you can eat at same time.