Yes, it is possible to create a formula or a macro to separate the data into respective columns. Here's how you can do it using a formula:

1. Assuming that the barcode scan is in cell A1, insert the following formula in cell B1:
   
   
   Formula:

   =LEFT(A1,FIND(" ",A1)-1) 

   This will extract the first entry (123-454-345) from the barcode scan.
   
2. Insert the following formula in cell C1:
   
   
   Formula:

   =MID(A1,FIND(" ",A1)+1,FIND(" ",A1,FIND(" ",A1)+1)-FIND(" ",A1)-1) 

   This will extract the second entry (r2.1) from the barcode scan.
   
3. Insert the following formula in cell D1:
   
   
   Formula:

   =RIGHT(A1,LEN(A1)-FIND(" ",A1,FIND(" ",A1)+1)) 

   This will extract the third entry (7012495) from the barcode scan.
   

Now you have each entry in their designated columns. You can copy and paste these formulas down to the rest of the rows to separate the data for all the entries.

Alternatively, you can create a macro to automate this process. Here's how:

1. Press Alt + F11 to open the Visual Basic Editor.
   
2. Click on Insert Module.
   
3. Insert the following code:
   
   
   Formula:

   Sub SeparateData()
    Dim cell As Range
    For Each cell In Selection
        cell.TextToColumns Destination:=cell, DataType:=xlDelimited, _
        TextQualifier:=xlNone, ConsecutiveDelimiter:=False, _
        Tab:=False, Semicolon:=False, Comma:=False, Space:=True, _
        Other:=False, FieldInfo:=Array(Array(1, 1), Array(2, 1), Array(3, 1)), _
        TrailingMinusNumbers:=True
    Next cell
End Sub 

4. Press F5 to run the macro.
   
5. Select the range of cells that contain the barcode scans.
   
6. Run the macro.
   

This will separate the data into respective columns for all the entries in the selected range.