Answer:
7,000 units 
Explanation:
Calculation for the number of units set forth in the production budget, representing total production for the current period
Using this formula 
Number of units =Current period +Ending inventory - Beginning inventory 
Where, 
Current period =7,000 units
Ending inventory=400 units 
 Beginning inventory =400 units 
Let make plug in the formula above 
Number of units =7,000 units + 400 units-400 units 
Number of units =7,000 units
Therefore the Number of units will be 7,000 units