Enter header and formula, copy down column

Attached is sample workbook.

On sheet Filtered_Data, I need macro to enter header into the first empty column.
This column may vary, so it must be dynamic - first empty column, Row1.
Header - "Ground Rates"

In that column, Row 2, I need the following formula entered and copied down the column.

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Wayne Taylor (webtubbs)Commented:
Try this....

Sub InsertFormula()
    Dim NextCol As Long, LastRow As Long
    With Filtered_Data
        NextCol = .Cells(1, Columns.Count).End(xlToLeft).Column + 1
        LastRow = .Cells(Rows.Count, "A").End(xlUp).Row
        .Cells(1, NextCol) = "Ground Rates"
        .Range(.Cells(2, NextCol), .Cells(LastRow, NextCol)).FormulaR1C1 = "=IF(RC4>=150,(VLOOKUP(RC4,GR,RC12,TRUE)/150)*RC4,VLOOKUP(RC4,GR,RC12,FALSE))"
    End With
End Sub

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Euro5Author Commented:
Perfect thanks!!! :)
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