The inventory information of Alien limited was as follows: Raw materials, 31 Dec 20x8: $16,500 Raw materials, 31 Dec 20x9: $38,900 Work in process inventory, 31 Dec 20x8: $7,500 Work in process inventory, 31 Dec 20x9: $8,800 Finished goods inventory, 31 Dec 20x8: $47,400 Finished goods inventory, 31 Dec 20x9: $36,400 Raw materials purchases in 20x9: $75,400 What is the amount of raw materials used in the year of 20x9?