Greetings!

I have the following columns:

A. Cost B. Plan C. Additional D.
Total
$100.00 OTN $35
$135
OTN2 $40
$0
$150.00 OTN4 $25
$175

How can i get the TOTAL field to calculate Column A and C only when there is
a value entered in Column A? In case you are wondering, the Additional
Column (c) has assigned values, however I don't want a total if there isn't
data in Column A?

I hope you understand my msg.

Thanks for any help.