This is my current formula:

=((Z6+(IF(C6="P",(AB$41+AB$27),IF(C6="B",(AB$48+AB $118),IF(C6="T",(AB$43+AB$18),IF(C6="DT",(AB$8+AB$ 18),IF(C6="ST",(AB$49+AB$119),IF(C6="AT1",(AB$30+A B$6),IF(C6="AT2",(AB$28+AB$11),IF(C6="DC",(AB$30+A B$11+AB$119),0)))))))))))

I need to add one more if function in this formula. What is the recommended
formula i should use. I would love to put this in a macro but not sure how i
should go about doing this.

Please advise

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sarah