On January 1, 2012, Matthew Company's Work in Process Inventory

On January 1, 2012, Matthew Company's work in process inventory account had a balance of $30,000. During 2012, $58,000 of direct materials was placed into production. Manufacturing wages incurred amounted to $84,000, of which $66,000 were for direct labor. Manufacturing overhead is allocated on the basis of 120% of direct labor cost. Actual manufacturing overhead was $90,000. Jobs costing $220,400 were completed during 2009. What is the December 31, 2012 balance in work in process inventory?

A) $16,800
B) $34,800
C) $6,000
D) $12,800