Answer:
188,000 units 
Step-by-step explanation:
For computing the equivalent units for material cost, first we have to compute the transferred units which is shown below: 
= Beginning finished good inventory units + units started and completed units
= 31,000 units + 130,000 units
= 161,000 units
Now the equivalent units for material costs equal to 
= Transferred units × percentage of completion + additional units in process × percentage of completion 
= 161,000 units × 100% + 27,000 units ×60% 
= 161,000 units + 27,000 units 
= 188,000 units