OPINION
SCHAFER, Judge.
The issue in this case is whether three chemicals, sulfuric acid, LIX, and Orfom SX-7, used to produce cathode copper from copper ore, are "machinery" or "equipment." If they are, A.R.S. 42-1409(B)(1) exempts their cost from taxation.
The taxpayer, Cyprus Sierrita Corporation, is engaged in the business of producing copper from oxide copper ore and sulfide copper ore. The ores contain very low concentrations of copper; their...
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