Copy, pasting the informations

I have a workbook containing 4 sheets.. 1,2,3, master. I need to copy the informations in the sheets 1,2 and 3 and paste it in the master sheet.

The datas may vary everyday and the cell A contains the formula (till A100) which is protected. Will be great if you provide me the coding which points at Cell B.

I have attached the sample workbook.

Thanks a ton