how to calculate budget profit and actual profit?

[#1]

hi friend's i have   budget revenue and actual revenue 

i calculated

[actual revenue]-[ budget revenue]

and

[budget cost]-[actual cost]

above both given current out put so

i want [budget profit]   and [actual profit]  fields  trough above both 4 field   please tell me any one how will take budget profit and actual profit by using above 4 fields

[JonnyPoole]

Can you post a screenshot of your desired outcome ?