Why are the Totals not exactly right ?

Question

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 ?

Answer 1

That is balance ... Balance is always not equal as spent.

For example 100 RS

50 50
40 10
10 0

Here balance total is 60.