Net present valueunequal lives

Dakota Mining Company has two competing proposals: a diamond core drill or a hydraulic excavator. Both pieces of equipment have an initial investment of $722,559. The net cash flows estimated for the two proposals are as follows:

Year	Net Cash Flow Diamond Core Drill	Net Cash Flow Hydraulic Excavator
1	$230,000	$288,000
2	205,000	267,000
3	205,000	246,000
4	163,000	253,000
5	124,000
6	104,000
7	90,000
8	90,000

The estimated residual value of the diamond core drill at the end of Year 4 is $290,000.

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
7	0.665	0.513	0.452	0.376	0.279
8	0.627	0.467	0.404	0.327	0.233
9	0.592	0.424	0.361	0.284	0.194
10	0.558	0.386	0.322	0.247	0.162

Determine which equipment should be favored, comparing the net present values of the two proposals and assuming a minimum rate of return of 12%. Use the present value table appearing above.

Line Item Description	Diamond Core Drill	Hydraulic Excavator
Present value of net cash flow total	?	?
Amount to be invested	$ 722,559	$ 722,559
Net present value	?	?

Which project should be favored?

Answ/ Hydraulic Excavator