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Segment Information (Tables)
3 Months Ended
May 31, 2013
Segment Information Tables  
Segment information
  Three Months Ended May 31, 2013   Three Months Ended May 31, 2012
    Rental Real         Rental Real    
  Ultrasonic Estate       Ultrasonic Estate    
  Spraying Operations Eliminations Consolidated   Spraying Operations Eliminations Consolidated
Net Sales $2,353,979 $54,350 $33,935 $2,374,394   $2,818,857 $54,779 $33,934 $2,839,702
Rental Expense $33,935 $34,482 ($33,935) $34,482   $33,934 $29,020 ($33,934) $29,020
Interest Expense $726 $27,049   $27,775   $1,051 $27,919   $28,970
Net Income (Loss) $80,928 ($7,180)   $73,748   $13,260 ($2,160)   $11,100
Assets $6,821,131 $2,478,605   $9,299,736   $6,918,542 $2,513,137   $9,431,679
Debt $125,858 $1,956,328   $2,082,186   $184,477 $2,020,161   $2,204,638