Need help on how to display the message for my practise in java

hi I kind of need some help you see I want to display the message that says on the javac in command prompt that says

//Enter parcel weight:
//200
//A 200 gram parcel costs $2.50 to deliver.

the problem is the formula that bothers me a lot

Weight Range Delivery Cost
Up to 200 grams 2.50
201 to 500 grams 4.00
501 to 100 grams 6.50
1001 to 5 kg 6.50 plus 50 cents for each additional 500 grams or part there of
Over 5 kg 14.00

Parcels over 15kg are not accepted

the formula that I can come up with is 1001-501/500*0.50 + 6. 50 is 7.00 but when it says over 5kg (5000 grams) for 5001 grams and up to 15 kg

the number is that not good since if I use 5001-501/500*0.50+6.50 is 11.00

that's where I want the number over 5kg up to 15kg is 14.00

here's the code that I have written.


/* File: DeliveryCompany.java
Author: Andrew
Date: September 18 2007
Purpose: To show that the Parcel deliver shows the actually values
*/

import java.util.Scanner;
import java.text.DecimalFormat;

public class DeliveryCompany
{

private static DecimalFormat currency = new DecimalFormat("$ #, ## 0.00");
public static void main(String[] args)
{

//Declartions
int weightParcel; = 0;
double deliveryCost; = 0;
double newWeightParcel; = 0;
Scanner input = new Scanner(System.in);


//prompt the user for entering the parcel weight
System.out.println("Please enter parcel weight");
weightParcel = input.nextInt();

//convert delivery cost into money sign

deliveryCost(Currency.format(deliveryCost);

// make decision on weight parcel

if(weightParcel < = 0)
{

if(weightParcel <= 201)
{
if(weightParcel <=501)
{
if(weightParcel <= 1001)
{
if(weightParcel <= 5001)
{

if (weightParcel <= 150001)
{

deliveryCost = 0;
}
else
{
deliveryCost = 14.00;
}
}
else
{
newWeightParcel = weightParcel-1001/500*0.50 +6.50;
}
}
else
{
deliveryCost = 6.50;
}

}
else
{
deliveryCost = 4.00;

deliveryCost = 2.50;


}
else
{
system.out.print("Sorry that number is invalid.")

}

}


}
// display results
System.out.print("A " + weightParcel + "will cost" + deliveryCost + "to deliver");

}

}