I am using 3.1 with WindowsXP
In Calc, Cell A1 is either empty or has a 0 in it. Cell B1 has either =A1+20 in it. When cell A1 is either empty or has a 0 in it, I want cell B1 to be empty or in some way indicate that A1 is either empty or has a 0 in it. If any number, except 0, is in cell A1 I want B1 to have the correct answer. What is the correct entry to make in B1?
