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Inventories
3 Months Ended
Jan. 31, 2012
Notes to Financial Statements  
Inventories

(7) Inventories

 

Inventories are valued at the lower of cost or market, with costs determined by the first-in, first-out method. Inventories at January 31, 2012 and April 30, 2011 consist of the following categories:

 

   January 31,
2012
   April 30,
2011
 
Raw materials  $1,992,000   $3,229,000 
Work in process   40,000    36,000 
Finished goods   1,292,000    2,197,000 
   $3,324,000   $5,462,000