I am trying to interpolate a value in the table. However since my column cells are merged together, my code won't read the values. So far whenever i unmerge those columns, it works completely fine and gives me the value i want. How do i integrate merged cells as a matrices?

Sub brent()

    Dim i As Integer, j As Integer
    Dim P As Single, P1 As Single, P2 As Single
    Dim M As Single, M1 As Single, M2 As Single
    Dim inputmat()

    nrow = 29
    ncol = 2

    P = Range("Axial").Value

    ReDim inputmat(nrow, ncol)

    For i = 1 To nrow
        For j = 1 To ncol
        inputmat(i, j) = Cells(5 + i, 6 + j)
        Next j
    Next i
    If (P > inputmat(1, 1)) Or (P < inputmat(nrow, 1)) Then Range("PM").Value = 
    "NG"
    Else
        For i = 1 To nrow - 1
           If (P <= inputmat(i, 1)) And (P >= inputmat(i + 1, 1)) Then
              P1 = inputmat(i, 1)
              P2 = inputmat(i + 1, 1)
              M1 = inputmat(i, 2)
              M2 = inputmat(i + 1, 2)
          End If
    Next i

    For i = 1 To nrow

    M = M1 + (P - P1) * (M2 - M1) / (P2 - P1)

    Next i

    Range("PM").Value = M
    End If

    End Sub

I know that there is problem under the
input (i,j)= cells(5+i,6+j)
Is there any way to read that black column between the merged cells?