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Here are the costs and benefits of Landmine clearance Benefits: 1) Production from saved lives & saved disabilities 2) Saved medical cost 3) Agricultural output Table 1. The benefits of one year of de-mining (present values, USS). Assumption set I Assumption set II Production from saved deaths 6.4321 128.6405 Production from saved disabilities 3,2163 64.320% Saved medical costs 26,4003 26,4003 Value of additional agricultural output 688,0004 137.6007 Total benefits 724.048 455.600 Notes: '1/25 of 1,200 deaths x $134. 21/25 of 1,200 disabilities x $67. $1/25 of 1,200 injured x $550. #1/25 of 500,000 ha x 0.40 x $86. $1/25 of 1,200 deaths x $2680. 61/25 of 12,000 disabilities x $1340. 71/25 of 100,000 ha x 0.40 x $86. The annual costs of completely demining the country over 25 years are estimated to be $140 million whereas the annual benefits are only $0.7 million. Using a 10 per cent discount rate, the total demining expenditure (in present values) of $3,500 million would result in a net present value of -$3,434 million. An alternative set of assumptions, including a halving of the costs of de-mining over 25 years, produces net present values of more than -$400 million. Are the net benefits correctly calculated above? What are the net benefits