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STATEMENTS OF UNALLOCATED RESERVE AND TRUST CORPUS (Equity) - USD ($)
Unallocated Reserve
Trust Corpus
Total
Beginning Balance at Jan. 31, 2015 $ 1,611,124 $ 3  
Units, Beginning Balance at Jan. 31, 2015 13,120,010    
Increase (Decrease) in Unallocated Reserve and Trust Corpus      
Net income $ 8,558,841   $ 8,558,841
Second quarter's distribution paid (524,800)    
Fourth quarter's distribution declared/paid (656,001)    
Ending Balance at Jan. 31, 2016 $ 8,989,164 3  
Units, Ending Balance at Jan. 31, 2016 13,120,010    
Increase (Decrease) in Unallocated Reserve and Trust Corpus      
Net income $ 9,613,112   $ 9,613,112
First quarter's distribution paid (2,624,002)    
Second quarter's distribution paid (2,624,002)    
Third quarter's distribution paid (1,312,001)    
Fourth quarter's distribution declared/paid (1,836,801)    
Ending Balance at Jan. 31, 2017 $ 10,205,470 3  
Units, Ending Balance at Jan. 31, 2017 13,120,010   13,120,010
Increase (Decrease) in Unallocated Reserve and Trust Corpus      
Net income $ 33,495,567   $ 33,495,567
First quarter's distribution paid (7,216,006)    
Second quarter's distribution paid (2,099,202)    
Third quarter's distribution paid (8,396,806)    
Fourth quarter's distribution declared/paid (15,481,612)    
Ending Balance at Jan. 31, 2018 $ 10,507,411 $ 3  
Units, Ending Balance at Jan. 31, 2018 13,120,010   13,120,010