Sum Rows

[eeeo]

Hello friends:

I have a table with two columns, column A and B.

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I need a formula/VBA Code that take the first row and sum the rows before.

for exmple:

column A
3
2
5
6

in column B i will get
3 = 3 from A
5 = 3+2 from A
10 = 3+2+5 from A
16 = 3+2+5+6 from A

thanks!