sir according to fao participatewise oi data file of NSE , fii derivative statistics oi data file of NSE and nsdl website fii
sold 24300 contract (in rupee 2278 cr ) in index future during 27 to 29 may. but you told us that they buy 7000 cr in index future. how it is possible.
some point you are missing that is total position in index future is increased by 7000 cr . but in this 2846 cr is buying and 5046 cr is selling.