How to compute Net Present Value
1. PV of Cash Inflows, net = ACI before tax x (1-tax rate) + Depreciation Tax Shield + Salvage Value (new) x (1-tax rate) + Working capital released - Cost of major repairs/overhauling
2. PV of Cash Outflows, net = Cost of investment + Working capital required - Salvage value of old
3. NPV = PV of Cash Inflows, net - PV of Cash Outflows, net