LocationUtil.java

public class LocationUtil {
    public static int calculateDistanceInKm(double latitude1, double longitude1, double latitude2, double longitude2) {
        Location location1 = new Location("location_1");
        location1.setLatitude(latitude1);
        location1.setLongitude(longitude1);
        Location location2 = new Location("location_2");
        location2.setLatitude(latitude2);
        location2.setLongitude(longitude2);
        return (int) Math.ceil(location1.distanceTo(location2) / 1000);
    }

    public static int calculateDeliveryCost(int distance) {
        int deliveryCost = 12;
        if (distance > 3) {
            for (int i = 4; i <= distance; i++) {
                deliveryCost += 2;
            }
        }
        return deliveryCost;
    }
}