| Purchase price: | | | | |
| Cash payments | | $ | 10,100,000 | |
| Joint venture option acquired in 2005 for cash | | | 690,000 | |
| Warrants issued for joint venture option | | | 1,918,481 | |
| Common stock issued | | | 66,879,375 | |
| Monthly payments, current portion | | | 167,827 | |
| Monthly payments, net of current portion | | | 2,333,360 | |
| Acquisition costs | | | 127,000 | |
| | | | | |
| Total purchase price | | | 82,216,043 | |
| | | | | |
| Net deferred income tax liability assumed - Clarkdale Slag Project | | | 48,076,734 | |
| | | | | |
| Total | | $ | 130,292,777 | |
| Allocation of acquisition cost: | | | | |
| Clarkdale Slag Project (including net deferred income tax liability assumed of $48,076,734) | | $ | 120,766,877 | |
| Land - smelter site and slag pile | | | 5,916,150 | |
| Land | | | 3,300,000 | |
| Income property and improvements | | | 309,750 | |
| | | | | |
| Total | | $ | 130,292,777 |
| | | 2013 | | 2012 | | ||
| | | | | | | | |
| Slag Pile, beginning balance | | $ | 121,667,730 | | $ | 121,555,117 | |
| Capitalized interest costs | | | 92,081 | | | 112,613 | |
| Slag Pile, ending balance | | $ | 121,759,811 | | $ | 121,667,730 | |