Assume the following information pertaining to Moonbeam Company:

Beginning Finished Goods Inventory = $130,000
Ending Finished Goods Inventory = $124,000
Beginning WIP Inventory = $85,000
Ending WIP Inventory = $104,000
Beginning Direct Materials = $117,000
Ending Direct Materials = $130,000

Costs incurred during the period are as follows:
Total Manufacturing Costs = $896,000
Factory Overhead = $199,000
Direct Materials Used = $156.000

Materials purchases are calculated to be:
a) $143,000.
b) $156,000.
c) $91,000.
d) $169,000.
e) $140,000.