Macro to select minimum and replace value to other cell in same row

[Osiriz]

Hi all!

This is my first post, so please be gentle! :D

This is my problem:

I want to automatically select the minimum value in a column and then replace the value on other cell on the same row. Something like this:

Name	Owned	Cost
A	10	9
B	50	3
C	20	5

So, I want the macro to find the minimum on the "Cost" column (3), and then add a value (for instance 5) to the column "Owned" on the same row, so the value goes from 50 to 55.

I have a very long list, so doing it manually takes a lot of time. I use formulas to get the minimum cell and corresponding names on the same row: =ÍNDICE(B2:B233;CORRESP(MÍNIMO(F2:F233);F2:F233;0)).
But then I have to sum 5 to the adjacent cell manually, that's the time consuming part!

Sorry but my Excel is in Portuguese, but if needed I think I can give the formula names in English.
Any ideas how to get a macro for this?

Sorry for the long text and thanks in advance!!