title: excel formula: end date - todays date plus another variable
body: <p>i need an excel formula to calculate the total days remaining for a cell: end date minus todays date plus extension days(maybe 30-90 amount is in a cell) i have tried <code>=days360(today's date,end date + number of extension days)</code> in a different cell but it isn't giving me the correct total</p>
  
  <p>It's giving me the wrong amount of days. I have a formula calculating my end date as well, is that causing a problem <code>=SUM(start date+90+#of extension days)</code></p>