Bella sold a machine for $140,000. The machine originally cost $90,000 and $10,000 of MACRS depreciation had been allowable. The buyer assumed an existing loan of $40,000, paid $20,000 cash down and agreed to pay $10,000 per year for eight years plus interest. Selling expenses are $10,000. The total gross profit for installment sale recognition purposes is

A) $30,000.

B) $40,000.

C) $50,000.

D) $60,000.