Consider the following costs incurred in a recent period: Direct materials .................... $33,000 Depreciation on factory equipment. $12,000 Factory janitor's salary. $23,000 Direct labor ...... $28,000 Utilities for factory $9,000 Selling expenses ......... $16,000 Production supervisor's salary $34,000 Administrative expenses ............. $21,000 What was the total amount of the period costs listed above for the period? O $78,000 O $71,000 O $46,000 O $37,000