Transpose data in Excel and the result save as txt/csv

Dear All,

I have Excel Sheet with 2 columns (Column1 and Column2)

For Example,

Column1            Column2
A                       100
B                       150
C                       200

I would like the data of Column2 transpose to below of Column1.

Result
A
100
B
150
C
200

And the Result will be outputted to txt/csv format.

Anyone can help?