formula not calculating right

[Marilyn]

Hello in excel 2002
list price Units Discount Price
100 2 10.00% 80.00
columns a b c d consecutively.
this the formula I have in column D =A3-(A3*C3)*B3 result should be
180.00 . I get 80.00 How do I correct the formula ?
thanks in advance

 

[Tanya M]

It's the order of operations...

your formula should be: =(A3-(A3*C3))*B3

 

[Mike H]

You need to force the orecedence with parenthesis

=(A3-A3*C3)*B3

Mike

 

[bpeltzer]

You've applied the quantity to the discount but not to the list price.
Try =A3*B3*(1-C3)

 

[David Biddulph]

I don't know how arithmetic works in your country, but in the normal world:
=100-(100*10%)*2
=100-10*2
=80

What did you want to calculate if it wasn't
=A3-(A3*C3)*B3 ?

 

[David Biddulph]

If you want to ask a different question, which *would* give an answer of
180, you could calculate
=(100-10)*2 instead of =100-10*2
so if that is what you want you could change
=A3-(A3*C3)*B3 to =(A3-(A3*C3))*B3
There are, no doubt, countless other ways of getting 180 from those input
values, but that is the most likely.
Another way of expressing the same thing would be =A3*(1-C3)*B3.

 

[David Biddulph]

And if you need to remind yourself, for the future, of the precedence rules
for arithmetic operations, type the word "precedence" into Excel help.