How many cals should i eat while playing vars. bball and trying 2 lose weight?

well im a grl and i need 2 only lose a few pounds like 5-10 at the very most and i practice everyday for 2 hrs...but since i wanna lose how much should i eat? when i wasnt playing alot like in the summer i ate 1500 everyday but wat about nowz?? any help is verrry much appreciated lol..(btw im like and inch away from a flat stomach and i do like 100 sit ups erday so any help wit that would b cool 2 plz XD cuz theres alot of muscle in my stomach but its under that fat that wont budge wit sit ups so maybe these 5-10 will help me.. yaaay)