Richard produces 15 kg of grape, then consumes 5 kg of it, sells 10 kg of it. 5 kg of it is bought by a restaurant, which made 10 grape pie with it. The restuarant sells 5 grape pies and gives 5 grape pies to a charity free. 5 kg of it is bought by a supermarket, which transports it to a different city, and sells there to customers. How much does Richard, restaurant and supermarket contribute to the GDP? .