An update on the official visa information website of the U.S. Mission in India indicates that the consular exchange rate (which is currently INR 70 to 1 USD) is set to change on August 27, 2018. Any payments made on or after this date will be affected. It is important to check the current consular exchange rate at http://www.ustraveldocs.com/in/in-niv-visafeeinfo.asp prior to paying the visa application fees.

This update can be found here.