added sample data

Tax was added

src/main/java/tech/iBeans/POSware/Lite/data_test.java

@@ -25,6 +25,7 @@ public class data_test {
         item_2.put("Name", "a Discount");
         item_2.put("Price", 1);
         item_2.put("Discount", -2);
+        item_2.put("Tax", 3);
         fake_items.put("13a", item_2);
         
         Dictionary item_3 = new Hashtable<>();