Adjustment of Status - I-485

Everything started smoothly until I went on my interview on dec 5th and my case been pending since then . It still says interview was scheduled at the end of the interview the officer gave me a white paper saying interview was completed and case must be reviewed. But my husband got a question wrong which was the officer asked him how much was the application fees , I don’t even remember how much we paid for that and my husband said $600 he just didnt even remember the real price of it because I got the money order from money on our saving . I hope this is not a real big deal . But this process is stressful overall I hope God make a way asap .
Brooklyn field office