if (label.equals("hours")) {

                        String hour = getTimeFormattedInAMPM(sale_obj.getString("created_at"));

                        // 1
                        int index = Arrays.asList(sales_labels_1).indexOf(hour);
                        int count = 1;
                        if(index > 0){ // hour doesnt exist in sales_label_1
                            sales_labels_1.add(hour);
                            index = 0; // overwrite index
                        }
                        else {
                            int current_count = groupedSales.getInt(hour); // read the current count
                            count = Integer.valueOf(current_count) + 1; // increment by 1
                        }
                        groupedSales.put(hour, count);
                        sales_values_1.add(new Entry(Float.valueOf(String.valueOf(count)), index));

                        // 2
                        int count = 1;
                        int index = Arrays.asList(sales_labels_1).indexOf(hour);
                        if(index <= 0){ // hour exist in sales_label_1
                            int current_count = groupedSales.getInt(hour); // read the current count
                            count = Integer.valueOf(current_count) + 1; // increment by 1
                        }
                        else {
                            index = 0; // overwrite index
                            sales_labels_1.add(hour);
                        }
                        groupedSales.put(hour, count);
                        sales_values_1.add(new Entry(Float.valueOf(String.valueOf(count)), index));

                        // 3
                        int index = 0;
                        int count = 1;
                        if(sales_labels.contains(hour)){ // hour exist in sales_label_1
                            index = Arrays.asList(sales_labels_1).indexOf(hour);
                            int current_count = groupedSales.getInt(hour); // read the current count
                            count = Integer.valueOf(current_count) + 1; // increment by 1
                        }
                        else {
                            sales_labels_1.add(hour);
                        }
                        groupedSales.put(hour, count);
                        sales_values_1.add(new Entry(Float.valueOf(String.valueOf(count)), index));

                    }