Reports :: Hourly Rate - Calculated Totals Not Adding Up

We recently have had a change to our hourly rate that we pay and now the Totals calculation is not adding up the numbers correctly.

In the query that the report is based from:

ExtendedTotal: CCur([Hours]*[Rate])

In the footer of the report: (Provides a Total for each Day)

Sub-Total: "Control Source" is: =Sum(CCur([ExtendedTotal]))

Report Footer: (Provides a Grand Total for the Month)
Total: "Control Source" is: =Sum([ExtendedTotal])

Problem comes in with the odd dollar rate time partial hours. For example:

$9.73 x 4.5 hours = $43.785 (Rounds to $43.79) which is fine...

but when you have a whole column of these rounded numbers, the totals are coming out off by pennies which add up to a good bit at the end of the month. I cannot match up the totals with the invoices that are coming in either.