Date Result

Hi Guys,

I have a question i have date in column B "IGR-02282014-10385",
the bold ones is the date. Now what i want is to add the 40 days in that date and then in one column it will tell me from 40 days how many days left

Like that:

for example:

IGR-02282014-10385

for over there the date is 02282014+40=04/09/2014

Today is 03/20/2014.

So it will show me 20 days left.

Can you guys help me in that?