private void btnStaffInventoryBack_Click(object sender, EventArgs e)
{
staffPosForm staffPos = new staffPosForm();
this.Hide();
staffPos.Show();
}
private void btnAdminSalesData_Click(object sender, EventArgs e)
{
staffPosForm staffPosForm = new staffPosForm();
this.Hide();
staffPosForm.Show();
}