Calories intake (increase activity)

dachinababe

Hey all.
So I'm soooo excited to start my half marathon training next Tuesday. I'm doing a 9 weeks training program to be prepared for the 13.1 miles. On an average I will be running by 25 miles a week ,in addition to break dance everyday for two hours. Currently, I'm definitely under feeding myself cause I can't finish 1200 calories a day but I burn at least 500 calories by break dancing.Would you guys help me readjust my calories according to my training level?
I am 19,130, 5.0 and trying to lose 20 pounds to become a more efficient runner and break dancer.
Greatly appreciated