Advice?

public class App {

    public static void main(String[] args) {
        Supermarket supermarket = new Supermarket();
        supermarket.start();
    }
}

public class Supermarket {
    private final Map<String, Integer> shoppingCartItems = new HashMap<>();

    public void start() {
        getValuesFromFile();
        System.out.println("There are " + shoppingCartItems.size() + " items in the cart.");
        int sum = 0;
        Object randomValue = getRandomItem();
        sum = getPriceSum(sum, randomValue);
        System.out.println("Which is a total of $" + sum + " dollars.");
    }

    private int getPriceSum(int sum, Object randomValue) {
        for (Map.Entry<String, Integer> entry : shoppingCartItems.entrySet()) {
            System.out.println(entry.getKey() + ":" + entry.getValue());
            if (isOnDiscount() && randomValue == entry.getValue()) {
                sum = getDiscount(sum, entry);
            } else if (isPriceIncrease() && randomValue == entry.getValue()) {
                sum = getPriceIncrease(sum, entry);
            } else {
                sum += entry.getValue();
            }
        }
        return sum;
    }

    private int getPriceIncrease(int sum, Map.Entry<String, Integer> entry) {
        System.out.println("There is a price increase on " + entry.getKey() + " which price has increased from " + entry.getValue() + " to "
                + (int) (entry.getValue() * 1.1));
        sum += entry.getValue() * 1.1;
        return sum;
    }

    private int getDiscount(int sum, Map.Entry<String, Integer> entry) {
        System.out.println("There is a discount on " + entry.getKey() + " which price has dropped from " + entry.getValue() + " to "
                + (int) (entry.getValue() * 0.7));
        sum += entry.getValue() * 0.7;
        return sum;
    }

    private Object getRandomItem() {
        Random generator = new Random();
        Object[] values = shoppingCartItems.values().toArray();
        return values[generator.nextInt(values.length)];
    }

    private void getValuesFromFile() {
        try {
            BufferedReader bufferedReader = getBufferedReader();
            addToShoppingCart(bufferedReader);
        } catch (IOException e) {
            throw new FileSystemNotFoundException("The file could not be found, check the file or adjust the location");
        }
    }

    private BufferedReader getBufferedReader() throws FileNotFoundException {
        File file = new File("src/main/resources/groceriesList.txt");
        FileReader fileReader = new FileReader(file);
        return new BufferedReader(fileReader);
    }

    private void addToShoppingCart(BufferedReader bufferedReader) throws IOException {
        String line;
        int MAX_LINE = 96;
        for (int i = 0; i < MAX_LINE ; i++) {
            line = bufferedReader.readLine().toLowerCase(Locale.ROOT);
            shoppingCartItems.putIfAbsent(line,(int) (Math.random()*100 +1));
        }
    }

    private boolean isOnDiscount() {
        double d = Math.random();
        return d < 0.5;
    }

    private boolean isPriceIncrease() {
        double d = Math.random();
        return d < 0.2;
    }
}