Net Present Value-Unequal Lives Bunker Hill Mining Company has two competing proposals: a processing mill and an electric shovel. Both pieces of equipment have an initial investment of $679,829. The net cash flows estimated for the two propesa are as follows: Net Cash Flow Year . 2 Processing Mill Electric Shovel $207,000 $259,000 184,000 240,000 104,000 221,000 147,000 228,000 5 112,000 6 93,000 7 #1,000 H 81,000 The estimated residual value of the processing mill at the end of Year 4 is $260,000. Present Value of $1 at Compound Interest Year 6% 10% 12% 15% 20% 1 0.943 0.909 0.893 0.870 0.833 2 0.890 0.826 0.797 0.756 0.694 3 0.840 0.751 0.712 0.658 0.579 4 0.792 0.683 0.636 0.572 0.482 5 0.747 0.621 0.567 0.497 0.402 6 0.705 0.564 0.507 0.432 0.335