I am trying to make a calculator for renal function.

Ideal Body Weight (K6)
Actual Body Weight (I7)
ABW/IBW Ratio (K8)

Creatinine Clearance (IBW): (E11)
Creatinine Clearance (ABW*): (E12)
Creatinine Clearance (Actual): (E13)

I would like E12 to be selected if ABW/IBW Ratio >=1.2 (K8)
I would like E13 to be selected if Actual Boday Weight (I7) < IBW (K6)
I would like E11 to be selected if the above 2 conditions are not met.

Thanks so much for your help.

RB