I think you meant C7:F7 in #3. I did not code it for jagged ranges. As such, it could go something like:
Sub Main()
Dim ws As Worksheet, rH As Range, rH1 As Range, col As Range
Dim c As Range, i As Integer, a
Set ws = Worksheets("WkshtBal")
Set rH = Range("Hello")
Set rH1 = Range("Hello1")
ReDim a(1 To rH.Cells.Count)
For Each col In rH.Columns
Set c = ws.Cells(rH.Rows.Count + rH.Row, col.Column)
c.Formula = "=Sum(" & col.Address & ")"
i = i + 1
a(i) = c.Address & ":"
Next col
i = 0
For Each col In rH1.Columns
Set c = ws.Cells(rH1.Rows.Count + rH1.Row, col.Column)
c.Formula = "=Sum(" & col.Address & ")"
i = i + 1
ws.Cells(7, col.Column).Formula = "=Sum(" & a(i) & c.Address & ")"
Next col
End Sub