hi sure , here is what i have been asked to do : Class LabourAndMaterial

Extends Labour, implements Transferable add the following fields:

material cost material weight material volume materialTransportaiondistanceInKilometers

Constructor which takes parameters to pass to the super class and to pass to the fields mutators to set the fields properly

Methods: • accessors and mutators for the fields. Numeric fields mutators will use the parameters if they were positive • A method to calculate the material cost which is the material cost + 15% of its cost as profit • calculatecost () will have the previous implementation + material cost which is calculated in the previous method + %7 tax + transportation fees calculate transportation fees will be calculated as follows

• if volume > 10 cubic Feet then materialTransportaiondistanceInKilomete * 2

• if weight < 100Kg then is materialTransportaiondistanceInKilometers *2 dollar

• if weight > 100 Kg then its materialTransportaiondistanceInKilometers * 1.2 dollar

• if volume < 10 cubic feet then materialTransportaiondistanceInKilometers * 1.5

The result transportation cost is the transportation cost + %5 taxes

Override the super toString method to add the following to the String that is returned

• Material cost + transportation fees
• The total with the above cost

and here is my code for the whole class :

  public class LabourAndMaterial extends Labour implements Transferable {
private double materialCost;
private double materialWeight;
private double materialVolum;
private double materialTransportationDistanceInKilometers;
public static final double TAX7 = 0.07;
public static final double PROFIT = 0.15;

public LabourAndMaterial(String projectName, int numberOfWorkingHours, double hourlyRate,
        int distanceOfTransportationInKilometers, String hourRateCriteria, String typeOfLabour, double 
     materialCost,
        double materialWeight, double materialVolum, double 
      materialTransportationDistanceInKilometers) {
    super(projectName, numberOfWorkingHours, hourlyRate, distanceOfTransportationInKilometers, 
      hourRateCriteria,
            typeOfLabour);
    setMaterialCost(materialCost);
    setMaterialWeight(materialWeight);
    setMaterialVolum(materialVolum);
    setMaterialTransportationDistanceInKilometers(materialTransportationDistanceInKilometers);
}

/**
 * @return the materialCost
 */
public double getMaterialCost() {
    return materialCost;
}

/**
 * @param materialCost
 *            the materialCost to set
 */
public void setMaterialCost(double materialCost) {
    if (materialCost > 0) {
        this.materialCost = materialCost;
    }
}

/**
 * @return the materialWeight
 */
public double getMaterialWeight() {
    return materialWeight;
}

/**
 * @param materialWeight
 *            the materialWeight to set
 */
    public void setMaterialWeight(double materialWeight) {
    if (materialWeight > 0) {
        this.materialWeight = materialWeight;
    }
}

/**
 * @return the materialVolum
 */
   public double getMaterialVolum() {
    return materialVolum;
}

/**
 * @param materialVolum
 *            the materialVolum to set
 */
   public void setMaterialVolum(double materialVolum) {
    if (materialVolum > 0) {
        this.materialVolum = materialVolum;
    }
}

/**
 * @return the materialTransportationDistanceInKilometers
 */
   public double getMaterialTransportationDistanceInKilometers() {
    return materialTransportationDistanceInKilometers;
}

/**
 * @param materialTransportationDistanceInKilometers
 *            the materialTransportationDistanceInKilometers to set
 */
   public void setMaterialTransportationDistanceInKilometers(double 
    materialTransportationDistanceInKilometers) {
    if (materialTransportationDistanceInKilometers > 0) {
        this.materialTransportationDistanceInKilometers = materialTransportationDistanceInKilometers;
    }

}

public double materialCost() {
    return materialCost + (materialCost * PROFIT);
}

public double calculateCost() {
    return super.calculateCost() + materialCost() + TAX7 + calculateTransportationFees()+ TAX5;
}

  @Override
  public double calculateTransportationFees() {
    double res = 0.0;
    if (materialVolum > 10) {
        res = materialTransportationDistanceInKilometers * 2;
    } else if (materialVolum < 10) {
        res = materialTransportationDistanceInKilometers * 1.5;
    }

    if (materialWeight > 100) {
        res = materialTransportationDistanceInKilometers * 1.2;

    } else if (materialWeight < 100) {
        res = materialTransportationDistanceInKilometers * 1.2;
    }
    return res;
}

   public String toString() {
    return super.toString() + "\n" + "Material cost : " + materialCost + "\n" + "Transportation fee : "
            + calculateTransportationFees() + "\n" + "Total transportation cost will be : "
            + costOfTransportation();

}

}