I-485 Augent Help ...Confused

[batyblazz]

hi guy please i want to know how long does it take to get a FINAL DECISION made on I-485 after RFE has been sent.

2015 FILER
I-130 APPROVED ALREADY
WENT FOR INTERVIEW ALREADY
Insufficient documents at the day interview and new medical exams requested April 6, 2017
Response sent April 19,2017 when should i expect reply and am i going to receive GC or another interview.