ITR 3 - Rcvd notice under sec 143(1)(a)

dear all,
for one of the client, we received a notice under section 143(1)(a)
the prblm stated is produced below
1. in Schedule BP sl no A13, ie profit or loss after adjustment for depreciation (10+11-12iii) and the sum of amount entered in sl no 10+11-12iii are inconsistent
same kind of 3 more queries are rised by cpc
while chkng i don't see any discrepancy as sl no 10 is auto populated (loss) and sl no 11 and sl no 12 i don't hv any amounts to enter.
and sl no 13 auto populated...
now how to reply for this notice.. cn anyone guide pls....