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Note 4 - Property and Equipment: PROPERTY AND EQUIPMENT Table (Details) - USD ($)
Apr. 30, 2017
Apr. 30, 2016
Details    
Office Equipment $ 67,091 $ 39,800
Auto and Trucks 446,968 492,620
Machinery and Equipment, Gross 5,109,816 5,240,451
Buildings and Improvements, Gross 8,136,080 8,667,889
Construction in Progress, Gross 815,471 583,954
Property, Plant and Equipment, Gross 14,575,426 15,024,714
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (6,334,229) (5,870,637)
Property and equipment, net $ 8,241,197 $ 9,154,077