Problem at the Bank

 

A bank customer had $100 in his account.

He then made 6 withdrawals, totaling $100.

He kept a record of these withdrawals, and the balance left in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
$100 $99

Why are the Totals not exactly right?


 

Puzzle supplied by Richard Rider
 
 

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