private void btnToal_Click(object sender, EventArgs e)
{
cTax cost = new cTax();
if (txtQuantity.Text == "")
{
MessageBox.Show("Enter quantity", "Sales Inventory System", MessageBoxButtons.OK, MessageBoxIcon.Question);
txtQuantity.Focus();
}
else
{
cost.item1 = double.Parse(txtQuantity.Text);
iSubTotal = cost.GetAmount();
iTax = cost.cFindTax(iSubTotal);
iTotal = iSubTotal + iTax;
txtTax.Text = string.Format("{0:C}", iTax);
txtTotal.Text = string.Format("{0:C}", iTotal);
txtSubTotal.Text = string.Format("{0:C}", iSubTotal);
txtTax.BackColor = Color.Azure;
}
}
private void totalButton_Click(object sender, EventArgs e)
{
cTax cost = new cTax();
cost.item1 = double.Parse(txtQuantity.Text);
iSubTotal = cost.GetAmount();
iTax = cost.cFindTax(iSubTotal);
iTotal = iSubTotal + iTax;
txtTax.Text = String.Format("{0:C}", iTax);
txtSubTotal.Text = String.Format("{0:C}", iSubTotal);
txtTotal.Text = String.Format("{0:C}", iTotal);
txtTax.BackColor = Color.Azure;
}