The following information is available for the first month of operations for Bluemoon, Inc.:

Sales $850,000
Gross profit 330,000
Indirect labor 35,000
Indirect materials 14,000
Other factory overhead 9,000
Materials purchased 360,000
Total manufacturing costs 670,000
Materials inventory, end of period 20,000

Based on the information provided for Bluemoon, Inc., calculate the cost of goods sold.

a.$418,000
b.$520,000
c.$670,000
d.$650,000