private void txtMikeWater_TextChanged(object sender, EventArgs e)
        {
            double num;
            bool parse = Double.TryParse(txtMikeWater.Text, out num);
            if (txtMikeWater.Focused == true)
                if (parse && num >= 0 && num <= expenses[2])
                    txtPattiWater.Text = (expenses[2] - num).ToString();
                else
                    textBoxValidator(txtMikeWater, expenses[2], 0);

            double difference = Math.Abs(num - Convert.ToDouble(txtPattiWater.Text)) / 2;
            if (num > Convert.ToDouble(txtPattiWater.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) + difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) - difference).ToString();
            }
            else
                txtPattiRent.Text = ((expenses[0] / 2) - difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) + difference).ToString();
        }

        private void txtMikeElectric_TextChanged(object sender, EventArgs e)
        {
            double num;
            bool parse = Double.TryParse(txtMikeElectric.Text, out num);
            if (txtMikeElectric.Focused)
                if (parse && num >= 0 && num <= expenses[3])
                    txtPattiElectric.Text = (expenses[3] - num).ToString();
            double difference = Math.Abs(num - Convert.ToDouble(txtPattiElectric.Text)) / 2;


            if (num > Convert.ToDouble(txtPattiElectric.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) + difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) - difference).ToString();
            }
            else if (num < Convert.ToDouble(txtPattiElectric.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) - difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) + difference).ToString();
            }
        }

        private void txtMikeInternet_TextChanged(object sender, EventArgs e)
        {


            double num;
            bool parse = Double.TryParse(txtMikeInternet.Text, out num);
            if (txtMikeInternet.Focused)
                if (parse && num >= 0 && num <= expenses[1])
                    txtPattiInternet.Text = (expenses[1] - num).ToString();
            double difference = Math.Abs(num - Convert.ToDouble(txtPattiInternet.Text)) / 2;


            if (num > Convert.ToDouble(txtPattiInternet.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) + difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) - difference).ToString();
            }
            else if (num < Convert.ToDouble(txtPattiInternet.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) - difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) + difference).ToString();
            }
        }

        private void txtPattiWater_TextChanged(object sender, EventArgs e)
        {

            double num;
            bool parse = Double.TryParse(txtPattiWater.Text, out num);
            if (txtPattiWater.Focused == true)
                if (parse && num >= 0 && num <= expenses[2])
                    txtMikeWater.Text = (expenses[2] - num).ToString();
            double difference = Math.Abs(num - Convert.ToDouble(txtMikeWater.Text)) / 2;


            if (num < Convert.ToDouble(txtMikeWater.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) + difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) - difference).ToString();
            }
            else
            {
                txtPattiRent.Text = ((expenses[0] / 2) - difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) + difference).ToString();
            }

        }

        private void txtPattiElectric_TextChanged(object sender, EventArgs e)
        {

            double num;
            bool parse = Double.TryParse(txtPattiElectric.Text, out num);
            if (txtPattiElectric.Focused)
                if (parse && num >= 0 && num <= expenses[3])
                    txtMikeElectric.Text = (expenses[3] - num).ToString();
            double difference = Math.Abs(num - Convert.ToDouble(txtMikeElectric.Text)) / 2;
            if (num < Convert.ToDouble(txtMikeElectric.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) + difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) - difference).ToString();
            }
            else if (num > Convert.ToDouble(txtMikeElectric.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) - difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) + difference).ToString();
            }
        }

        private void txtPattiInternet_TextChanged(object sender, EventArgs e)
        {
            double num;
            bool parse = Double.TryParse(txtPattiInternet.Text, out num);
            if (txtPattiInternet.Focused)

                if (parse && num >= 0 && num <= expenses[1])
                    txtMikeInternet.Text = (expenses[1] - num).ToString();

            double difference = Math.Abs(num - Convert.ToDouble(txtMikeWater.Text)) / 2;
            if (num < Convert.ToDouble(txtMikeWater.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) + difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) - difference).ToString();
            }
            else if (num > Convert.ToDouble(txtMikeWater.Text))
            {
                txtPattiRent.Text = ((expenses[0] / 2) - difference).ToString();
                txtMikeRent.Text = ((expenses[0] / 2) + difference).ToString();
            }

        }