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Segment Information (Tables)
 3 Months Ended
May 31, 2017
Segment Information Tables  
Segment information
   Three Months Ended May 31, 2017   Three Months Ended May 31, 2016 
   Ultrasonic
Spraying		   Rental
Real Estate
Operations		   Eliminations   Consolidated   Ultrasonic
Spraying		   Rental
Real Estate
Operations		   Eliminations   Consolidated 
Net Sales  $2,500,734   $60,474   $49,074   $2,512,134   $2,216,211   $73,074   $49,074   $2,240,211 
Rental Expense  $49,074   $—   $(49,074)  $—   $49,074   $—   $(49,074)  $— 
Rental Operations Expense  $—   $21,396        $21,396        $24,923        $24,923 
Depreciation Expense  $84,106   $17,702        $101,808   $96,619   $18,194        $114,813 
Interest Expense  $—   $12,213        $12,213   $—   $13,745        $13,745 
Net Income (Loss)  $55,779   $(39,910)       $15,869   $88,653   $(32,862)       $55,791 
Assets  $8,692,745   $2,361,654        $11,054,399   $8,120,830   $2,437,225        $10,558,055 
Debt  $—   $1,139,213        $1,139,213   $—   $1,284,230        $1,284,230