DATE fomula challenge. really need help

DATE fomula challenge. really need help

Hi ,

I'd like to have user enter a StartDate, then specify a duration (1 w, or 3 m, or 1 yr, kinda like a subscription plan). I need to get back the ExpDate, and the count down in days to it. This way, I can sort data to lets say 3 days notice before expdate. I really need help.

Thanks so much.