Mapping help required - extension

Hi,

I 've done the mapping based on the below conditions

Let say 3 fields called : a,b,c

if a = RAM then

b = b/c

here b field is in one segment and a & c fields are in child segment of above segment.

Note : all the above fields occurance : 0 to 1

But, i need to display the target including with the above condition also i need the value of the field "b" should display at target side where the condition doesn't satisfy .. ie., a # RAM.

Here i 've tried with if then else condition...but that doesn't work.

Please help me out how can i get the output.

Thanks in advance for your help

Regards,

Y.Raj