How do I group pre-calculated values for one value to be used in another calculation?

i have form needs use 1 value calculation, result of 3 other pre-calculated values. how can group one-of-three values calculated value further used? acrobat 9 pro, imac.

 

example:

 

section 1:

only 1 result of following 3 conditions needed, , can entered, using radio buttons/check boxes assigned formula (which done successfully):

value 1 = - b

value 2 = c - d

value 3 = e + f

 

section 2 (the problem bit):

value 4 = g * (value 1 or value 2 or value 3)

 

 

thanks in advance,

sean.

simply create field calculates sum total of 3 fields,

and use field's name in next calculation.

the thing make sure field calculation order correct,

ie total field calculated before field uses value

is calculated.

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