IF formula needed

[alloyd1965]

I need an if formula for this situation.  

If Debit is in column G, I want the value in column F reflected in column H as a negative number.

If Debit is not in column G, I want the value in column F reflected in column H as a positive number. 

[#2]

=if(G2="debit",f2*(-1),f2)