I am making a unit cost estimation sheet and would like to have a drop down list where the user can choose from a list what items they want included for each estimate. The only problem is that there will be a few hundred items in the list which will make the drop down list difficult to use. In order to make things easier I would like to make groups of similar type items and have two drop down lists. The user would choose what type of item they wanted (in my case it would be Roadway, Structural,or Drainage items) from the first list and then the second list would list the group specific items. I was thinking of some sort of "if" statement for the second drop down list that would validate different drop down lists depending on what choice was made from the first drop down menu. If anyone understands what I'm trying to do and has any insight I would appreciate your input. Thanks in advance.