主题：复杂汇总问题

Static s As String
Dim s1 As String
Dim n As Double
For i As Integer = 0 To Tables("表A").Rows.Count(True) - 1
    r = Tables("表A").Rows(i,True)
    If r.IsGroup
        s1 = r("汇总").Split(" ")(0) & " " & r("汇总").Split(" ")(1)
        r("型号") = r("汇总")
        If s = "" OrElse s1 <> s Then
            n = r("入仓") - R("出仓")
            r("库存") = n
        Else
            n + = r("入仓") - R("出仓")
            r("库存") = n
        End If
        s = s1
    End If
Next