A bank customer had Rs.100 in his account. He then made 6 withdrawals, totaling Rs.. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left

Rs.50 Rs.50

Rs.25 Rs.25

Rs.10 Rs.15

Rs.8 Rs.7

Rs.5 Rs.2

Rs.2 Rs.0

Rs.100 Rs.99

Why are the Totals not exactly right ?