pre_text: NOTE 8—INVENTORIES Inventories consist of the following (in thousands): At September 30, 2019, work in process and inventoried costs under long-term contracts includes approximately $5.8 million in costs incurred outside the scope of work or in advance of a contract award compared to $0.9 million at September 30, 2018. We believe it is probable that we will recover the costs inventoried at September 30, 2019, plus a profit margin, under contract change orders or awards within the next year. Costs we incur for certain U.S. federal government contracts include general and administrative costs as allowed by government cost accounting standards. The amounts remaining in inventory at September 30, 2019 and 2018 were $0.5 million and $2.0 million, respectively.
table: September 30,
table: 2019 2018
table: Finished products $10,905 $7,099
table: Work in process and inventoried costs under long-term contracts 46,951 63,169
table: Materials and purchased parts 48,938 23,710
table: Customer advances — (9,779)
table: Net inventories $  106,794 $  84,199
question: Analyse this data from a financial earnings document. What is the change in materials and purchased parts from 2018 to 2019?