title: excel formula: end date minus todays date plus extention days
body: <p>i need an excel formula to calculate the total days remaining for a cell:
  end date minus todays date plus extention days(maybe 30-90 amount is in a cell)
  i have tried =days360(todays date,end date + number of extention days in a different cell
  but it isnt giving me the correct total</p>
  
  <p>its giving me the wrong amount of days. i have a formula calulating my end date as well,is that causing a problem (=SUM(start date+90+#of exyension days))</p>