I am new here and I need your help to solve a tiny problem that I am having.

I am looking for a way to calculate dates inside days, so dates I have are below and days can be any number (lets call it 34 as an example).

20/01/14

07/03/14

26/03/14

18/04/14

24/05/14

21/06/14

So the 2nd date 07/03/14 minus 34 days is equal to 01/02/14 which is greater/equal to the 1st date 20/01/14 so I want the answer to be "Yes", the 3rd date 26/03/14 minus 34 is equal to 20/02/14 which is less than the previous date so the I want answer to be "No" (I am OK up to this point).

Here comes the tricky bit!

The forth date 18/04/14 minus 34 days is equal to 15/03/14, for which I`ll get "No" based on the above conditions but instead I want the answer to be "Yes" because I want the system to calculate it from the date which has "Yes" the last time. Instead of using of using 3rd date 26/03/14 it should go back to 2nd date 07/01/14 to get the answer.

20/01/14 - Blank

07/03/14 - Yes

26/03/14 - No

18/04/14 - Yes

24/05/14 - Yes

21/06/14 - No

Many thanks in advance.