I have a spreadsheet that is calculating intervals for equipment
maintenance. Some of the equipment must be serviced every x months,
some of the equipment must be serviced every x hours (of run time).

I have all the calculations worked out. The problem I am having is with
conditional formatting. In column A I have text that says either
"HOURS" or "MONTHS". Based on the value of that cell, I need Column B
to be formatted as either a Date (to return the date of the next
service) or as a Number (to return the hours till next service).

Any ideas on how to do that? Conditional formatting doesnt give the
option to format anything except Font, Border and Patterns. I need to
format the data type.

Thanks,

Robbie