public void CalcShip_CalcShippingCost_True()
{
Parcel box = new Parcel(7, 8, 9, 10);
Parcel box1 = new Parcel(1, 1, 1, 1);
Assert.AreEqual(16, box.CalcShip());
Assert.AreEqual(5, box1.CalcShip());
}