I am building a Pay Rate Calculator worksheet with a Flat/Base pay rate & numerous Overtime pay rates. I would like to be able to have the "Overtime" pay rate cells to change depending on my selection from my drop-down list. My list selections are "Flat Rate" and "Compounding". 1) If I select "Flat Rate" how can I make all the "Overtime" cell rates and totals default to zero or calculate to zero, to show the user there is no overtime rates to be applied to this job and to use the one rate to pay? 2)And if I select "Compounding" the Overtime rate cells are updated to add/include additional fees, to show the user Overtime rates apply to the job and penalties have automatically been calculated on top for them. Please explain like I'm a 2 year old - learning as I go. Many thanks :)