Apply Macro to a folder of files

Hello again,

I have a task that needs to be done.

More specifically, I want to copy from file Sample1 (Delta sheet) the first row and put it to the file Demo (main sheet) in the green highlighted row (no.71). Then, I want the results that will come up in row 74 (blue) to be copied to the Sample1 file again (Results sheet).
Now the demo file represents a stock. I have aproximately 100 stocks in a folder and I want to apply the same thing to all the files. So, I want to have all the results in the Sample1/results sheet for all the stocks of the file.
Any ideas on how this could be done?

Many thanks in advance,

Costas