Datagridview Flickers on changing combobox

Question

I am updating the cell format depending on the choice of combobox as soon as i choose value in combobox the cells where i want to change the format it starts flickering as shown in the video here

Here's the cell formating code:

private void dg_PDetails_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
    {
        if (cbo_PurchaseCurrency.Text == "Rupees Purchase")
        {
            var format = (NumberFormatInfo)NumberFormatInfo.CurrentInfo.Clone();
            format.CurrencySymbol = "₹ ";
            dg_PDetails.Columns["AmountProduct"].DefaultCellStyle.FormatProvider = format;
            dg_PDetails.Columns["AmountProduct"].DefaultCellStyle.Format = "c";
            dg_PDetails.Columns["RateProduct"].DefaultCellStyle.FormatProvider = format;
            dg_PDetails.Columns["RateProduct"].DefaultCellStyle.Format = "c";
        }
        else if (cbo_PurchaseCurrency.Text == "Dollar Purchase")
        {
            var formats = (NumberFormatInfo)NumberFormatInfo.CurrentInfo.Clone();
            formats.CurrencySymbol = "$ ";
            dg_PDetails.Columns["AmountProduct"].DefaultCellStyle.FormatProvider = formats;
            dg_PDetails.Columns["AmountProduct"].DefaultCellStyle.Format = "c";
            dg_PDetails.Columns["RateProduct"].DefaultCellStyle.FormatProvider = formats;
            dg_PDetails.Columns["RateProduct"].DefaultCellStyle.Format = "c";
        }
        String value = e.Value as string;
        if ((value != null) && value.Equals(e.CellStyle.DataSourceNullValue))
        {
            e.Value = e.CellStyle.NullValue;
            e.FormattingApplied = true;
        }
    }