Month puzzle September

Calling the brilliant minds in the group to solve this.

It is claimed that hardly 2% students could solve this:

January = 1017
February = 628
March =1335
April =145
May =1353
June = 1064
July = 1074
August = 186
September = ?

… Got answer?

Else check below..

Ans: 1999

Alphabetic position of first letter,  Month number, Number  of  alphabets