double TwoDayPackage::CalculateCost(){ //calculate shipping cost
double weight = getWeight();
double cPO = getCostPerOunce();
return (weight * cPO + FlatFee); //return cost with flat fee factored in
}
double OvernightPackage::calculateCost()
{
return (getWeight() * (getCostPerOunce() + feePerOunce));
}
// calculate shipping cost for package
double Package::calculateCost() const
{
return getWeight() * getCostPerOunce();
} // end function calculateCost
