Bough plc owns a complex manufacturing machine that originally cost 30 million four years ago. Bough is depreciating the machine on the straight-line basis over 20 years, assuming a zero residual value. Because the machine is highly specific to Bough's operations, it is unlikely to be sold in its current condition for more than 15 million net of selling costs. However, Bough expects total future net economic benefits from the machine over the rest of its useful life of 28 million. The present value of the future net economic benefits has been estimated at 18 million. At what amount should the machine be included in Bough's balance sheet?

a. Cost less depreciation (24 million)

b. Selling value net of selling costs (15 million)

c. Future net economic benefits (28 million)

d. Present value of future economic benefits (18 million)