Carpenter Corporation uses the weighted$-$average m$$thod in its pr$$cess costing system. This month, the beginning inventory in the

first processing department consisted of $600$ units, The costs and percentage completion of these units in beginning inventory were

Materials costs $$520060\%$ percent complete

Conversion costs $$850055\%$ percent complete

A total of $7,800$ units were started and $7100$ units were transferred to the second processing department during the month. The

following costs were incurred in the first processing department during the month:

materials Cost $$95000$

conversion costs $ $169,200$

The ending inventory was $85\%$ complete with respect to materials and $70\%$ complete with respect to conversion costs.

How many units are in ending work in process inventory in the first processing department at the end of the month?

multiple choice

a$.1300$

b$.900$

c$.7200$

d$.700$