Please help me to fill in the blanks on July, August, September, October, November and December. And also please tell me the sequence used in this

D D E F G Jun H T Feb T K Mar L Apr M IN May Budget 15 Jun 20 July 28 Aug Sep 34 Oct Mov 45 Dec 58 67 Cost incured 9 78 14 85 25 94 38 104 112 53 72 Project budget VS. Cost incured 120 - Budget 1 1 100 Cost incured 12 13 14 80 15 16 US Dollar (million) 17 60 18 19 20 40 21 22 20 23 24 25 O UB Dec Sep Oct Nov