internal static void Main()
{
Approver teamLead = new TeamLead();
Approver vp = new VicePresident();
Approver ceo = new President();
teamLead.SetSuccessor(vp);
vp.SetSuccessor(ceo);
var purchase = new Purchase(2034, 350.00);
teamLead.ProcessRequest(purchase);
purchase = new Purchase(2035, 32590.10);
teamLead.ProcessRequest(purchase);
purchase = new Purchase(2036, 122100.00);
teamLead.ProcessRequest(purchase);
}