I have a spreadsheet which checks to see if a field has data in it and then
does a simple multiplication. Then I have a simple sum of all the results in
the results column. I have another set of numbers doing the same thing. The
results all seem to be perfect. The problem is when I add the two sums. I
get a number that appears to be incorrect. I know excel is binary and may
not 'see' the numbers as I see them but I'd like to know how to make it treat
the numbers literally and add them accordingly.

Here's a sample of the sheet:

COLUMN C (looks at one sheet and copies the value that has been data-entered):
=IF(ISBLANK('Finance Worksheet'!E2),"",'Finance Worksheet'!E2)


COLUMN D (fixed number data-entered)


COLUMN E (which has about 15-20 rows that either have or don't have numbers
in them):
=IF(ISNUMBER(C20),((C20*D20)/1000),)

and then further down in the column:
=SUM(E20:E34)

My subtotal is 5092.75.


COLUMN F (just like in column e):
=IF(ISNUMBER(D41),((D41*E41)/1000),)

and then further down in the column:
=SUM(F41:F79)

My subtotal is 3439.22.


Then:
=E36+F81

My expected result is 8531.97 but I get 8531.96.

Please HELP!!!!!!