Answer: 1250 units 
Explanation:
GIVEN the following ;
JULY :
Expected sales = 1,990 units 
Ending of month target inventory =400 units 
AUGUST:
Expected sales = 2,140 units 
Ending of month target inventory =490 units 
SEPTEMBER:
Expected sales = 2,070 units 
Ending of month target inventory =460 units 
Ending of month target inventory in July = August beginning inventory = 400units 
Expected August unit sales = 2,140 units 
AUGUST ending inventory = 490 units 
Expected sales = beginning inventory + purchased inventory - ending inventory 
2140 = 400 + purchased inventory - 490 
2140 = 890 + purchased inventory 
Purchased inventory = 2140 - 890
August purchased inventory should be = 1250 units