Copying a range of data into another Master workbook below existing data

Hello,

I have a range of weekly data that I need to copy into another workbook, paste it below the data that already exists there and then delete the data from the original workbook. I would love to do this with vba but after hours of searching on how to do this my brain is frazzled.

I have 50 workbooks that I need to import weekly into one master sheet (Master.xlsm) but they need to be done individually after the weekly data has been checked. The master sheet will therefore have existing data and the new data needs to be appended at the bottom. Also column A will be blank in both workbooks so to find the last used row it will need to look in column B.

The number of rows in the weekly sheet will also vary rather than be a fixed range so I guess the last used row will also need to be found there too.

The attached file is a cut down version of my working file showing where the data starts on Row 14, I won't need to copy the headings.

Any help to get me started would be much appreciated.

Thanks