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Inventory
3 Months Ended
Apr. 30, 2012
Inventory [Abstract]  
Inventory

5.             Inventory

 

Inventories are stated at the lower of cost or net realizable value, and net of a valuation allowance for potential excess or obsolete material. Cost is determined using the average cost method. Depreciation related to manufacturing is systematically allocated to inventory produced, and expensed through cost of goods sold at the time inventory is sold.

 

Inventories consist of the following:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

April 30,

 

July 31,

 

2012

 

2011

Raw materials

$

 494,000

 

$

 498,000

Finished goods

 

 407,000

 

 

 363,000

 

$

 901,000

 

$

 861,000