L1, L2 Visa

I had been to the Chennai Consulate earlier for my L2 and B1/B2 visa and the process was very smooth. This time I had a different experience w.r.t the payment of fraud detection fees. My company had obtained DD for $500 during second week of August. When I went for Biometrics on 01 September 2015, one of the VFS personnel informed me that the dollar rates have gone up and I need to submit the differential in cash at the Consulate. I carried cash based on this information and had to shell out additional INR 1,000 in cash during the fee payment. (I was told I can make payment in credit card as well). However it appeared to me that not everyone was aware of this and atleast two people I saw had not carried any cash or wallets. I made a payment for one such person who has agreed to pay me back but I am not sure how many L1 aspirants went back and had to reschedule.
It is my honest suggestion that you check for the changes in consular exchange rates in http://chennai.usconsulate.gov/consular-fees.html before going for the interview.