i need to do a calculation. Example:

I have a Figure i.e. 3 Years 10 Months and 28 Days
If I add 1one, 4 months and 4 days to it, normally the result will appear as
4 years, 14 months and 32 days. What I want is to have the result is 5
years, 2 months and 2 days.

Year Month Days
3 10 28
1 4 4
4 14 32
It should appear as

5 2 2


Anybody can help??