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Net Present Value Unequal Lives Gold Creek Mining Company has two competing proposals: a processing m and an electric shovel. Both pieces of equipment have an initial investment of $756,227. The net cash flows estimated for the two proposals are as follows Net Cash Flow Electric Shovel Year Processing Mill $324,000 $259,000 231,000 300,000 231,000 277,000 184,000 285,000 140,000 117,000 101,000 101,000 The estimated residual value of the processing m at the end of Year 4 is $320,000. Present value of $1 at Compound Interest 10% 12% 15% Year 6%o 20% 0.943 0.909 0.893 0.870 0.833 0.694 0.890 0.826 0.797 0.756 0.840 0.751 0.712 0.658 0.579 0.792 0.683 0.636 0.572 0.482