Copy Paste MACRO - Would like a Revised Version That Might Work Better

I have a macro that is very elementary, and, I know, not effective. Though it works, it seems to take a while to process. Can you look at this to see if it can be simplified? I have tried to reverse engineer a code I found on here to mimic my situation, to no avail!

I have a 2 sheet workbook.
The Main page is called "PR&C", is where the information is pulled from, C39:G45 (each individual rows are merged into the C:G columns)
The next sheet is called "Vendors" where the information "copied" needs to be stored. There are more columns used here(by manual entry that has nothing to do with this initial entry), so I would need the entire row to be moved down while inserting the information.

Probably the biggest hurdle is on the PR&C sheet, the information is being pulled (as you might can see from the macro) from merged cells. and inserted into regular single cells on the Vendor's sheet. I currently have a button that processes the below macro request. I can stick with the button, no problem. But if a popup form can be created that the user would use instead of having to enter the information into the merged cells, would be better that would be amazing. But I don't know if that is even "a thing".

Thank you for any assistance with this!!
Below is my macro.

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