Add all the options

garage/src/Option/Aircon.java

+package Option;
+
+public class Aircon implements Option {
+
+    public double getPrice() {
+        return 300d;
+    }
+
+    public String toString() {
+        return "Aircon (" + this.getPrice() + " €)";
+    }
+}

garage/src/Option/CareerBars.java

+package Option;
+
+public class CareerBars implements Option{
+    public double getPrice() {
+        return 100;
+    }
+
+    public String toString() {
+        return "Career bars (" + this.getPrice() + " €)";
+    }
+}

garage/src/Option/ElectricGlass.java

+package Option;
+
+public class ElectricGlass implements Option{
+
+    public double getPrice() {
+        return 200d;
+    }
+
+    public String toString() {
+        return "Electric glass (" + this.getPrice() + " €)";
+    }
+}

garage/src/Option/GPS.java

+package Option;
+
+public class GPS implements Option {
+
+    public double getPrice() {
+        return 50d;
+    }
+
+    public String toString() {
+        return "GPS (" + this.getPrice() + " €)";
+    }
+}

garage/src/Option/HotSeat.java

+package Option;
+
+public class HotSeat implements Option {
+
+        public double getPrice() {
+            return 150d;
+        }
+
+        public String toString() {
+            return "Hot seat (" + this.getPrice() + " €)";
+        }
+    }
+}

garage/src/Option/Option.java

 package Option;
 
-public class Option {
+public interface Option {
 
+    double getPrice();
+
+    String toString();
 
 }