Variable Data DataTypes

//Calculatte the pen,pencil,eraser cost with 18% gst
float pencil = scan.nextFloat();
        float pen = scan.nextFloat();
        float eraser = scan.nextFloat();
        float gst = 0.18f;
        float totalCost = pencil + pen + eraser;
        float totalCostWithGst = totalCost + (totalCost * gst);
        System.out.println("Total cost of items (after adding 18% GST): " + totalCostWithGst);