A pastry shop sells three types of stuffed threads (strawberry, mango and apple), on Sunday, which is when the largest number of customers attend, the pastry shop put 4 strawberry, 2 mango and 2 apple threads on sale in such a way that when they were all sold, he would obtain a total of 3000 pesos, by noon they had sold 2 strawberries and one mango, thus obtaining a total of 1300 pesos, if it is known that the price of the mango thread is double that the price of the apple thread determines the price of each of the threads.