Sub FORMULEBIS()
Dim TAB1 ' C2:C1000 I, J
Dim TAB2 ' A2:A1000 K, L
Dim TAB3 'B2:B100 M, N
Dim I As Integer, J As Integer, K As Integer, L As Integer, M As Integer, N As Integer
TAB1 = Range("C2:C1000").Value
TAB2 = Range("A2:A1000").Value
TAB3 = Range("B2:B1000").Value
For I = 2 To 1000
For J = 3 To 3
For K = 2 To 1000
For L = 1 To 1
For M = 2 To 1000
For N = 2 To 2
TAB1(I, J) = TAB2(K, L) + TAB3(M, N)
Next J
Next I
Next K
Next L
Next M
Next N
Range("c2:c1000").Value = TAB1
End Sub