I am currently undertaking an exercise at varsity. I have 3 columns, with base, target, and actual. these 3 columns can be in percentages, actual numbers, dates, or currency. For example, base is 1-Jan-2013; target is 31-Dec-2013. The actual date is 20-Dec-2013.

I would like the second and third columns to automatically change to the format of the first column, for example, if the first column is in percentage (%), the remaining two columns automatically change to percentage.

is there a way of creating an error message on the second and third column if they do not match the format of the first column?

Thank you in advance those who can assist.