private void PlotBreakEvenPoint()
    {
        plot4.Clear();
        Finances finances = GameController.instance.player.finances;

        List <int> priceData = new List <int>();

        priceData.AddRange(finances.revenue);
        priceData.Sort();

        List <int> quantityData = finances.GetQuantityData();

        Regression regression = new Regression();
        float      a = 0; float b = 0; float rSq = 0;
        //regression.LinearRegression(quantityData.ToArray(), finances.revenue.ToArray(),out a, out b, out rSq);

        List <float> regressionData = new List <float>();

        float xSize = (quantityData.Max() - quantityData.Min()) / quantityData.Count;

        List <float> quantityNormalizedData = new List <float>()
        {
            0
        };

        for (int i = 0; i < quantityData.Count; i++)
        {
            quantityNormalizedData.Add(quantityNormalizedData.LastOrDefault() + xSize);
        }
        float        ySize = (priceData.Max() - priceData.Min()) / priceData.Count;
        List <float> regressionDataNormalized = new List <float>()
        {
            0
        };

        for (int i = 0; i < priceData.Count; i++)
        {
            regressionDataNormalized.Add(regressionDataNormalized.LastOrDefault() + ySize);
        }
        regressionDataNormalized.Remove(regressionDataNormalized.LastOrDefault());
        //  regressionData.AddRange(regression.Function(quantityNormalizedData, a, b));
        List <int> x = new List <int>()
        {
            1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
        };

        LineGraphVisual originalVisual           = new LineGraphVisual(containers[3], dotSprite, 12, false, new Color(1, 1, 1, 0.0f), Color.white);
        LineGraphVisual revenueVisual            = new LineGraphVisual(containers[3], dotSprite, 12, false, Color.cyan, Color.white);
        LineGraphVisual regressionVisual         = new LineGraphVisual(containers[3], dotSprite, 12, false, Color.yellow, Color.white);
        LineGraphVisual expencesRegressionVisual = new LineGraphVisual(containers[3], dotSprite, 12, false, Color.red, Color.red);
        List <float>    extrems            = new List <float>();
        List <float>    expencesRegression = new List <float>();

        if (finances.revenue.Max() >= finances.staticExpences.Max())
        {
            extrems = plot4.ShowPlot(finances.revenue, originalVisual, 14, containers[3], 0, 0, null, displayGrid: false);
        }
        else
        {
            extrems = plot4.ShowPlot(finances.staticExpences, originalVisual, -1, containers[3], 0, 0, displayGrid: false);
        }
        plot4.ShowPlot(regressionDataNormalized, revenueVisual, 14, containers[3], extrems[0], extrems[1],
                       (int i) => Mathf.RoundToInt(quantityNormalizedData[i]).ToString(), (float f) => String.Format("{0:n0} $", Mathf.RoundToInt(f)), displayGrid: true);

        List <int> yearExpences = finances.GetOverYearExpences();

        if (yearExpences.Count < x.Count)
        {
            for (int i = yearExpences.Count; i < x.Count; i++)
            {
                yearExpences.Add(yearExpences.LastOrDefault());
            }
        }
        regression.LinearRegression(x.ToArray(), yearExpences.ToArray(), out a, out b, out rSq);
        // take last 12 elements and delete the last one in order to make regression. Adjust x accordingly
        expencesRegression = regression.Function(x.ConvertAll(p => (float)p), a, b);

        Debug.Log("-----Linear Regression-----");
        Debug.Log("A: " + a + " B: " + b + "Rsquare: " + rSq);
        plot4.ShowPlot(expencesRegression, expencesRegressionVisual, -1, containers[3], extrems[0], extrems[1], displayGrid: false);
    }