Santiago plans to open a shoe store. He has agreed to pay $40 per pair of shoes that he will order from his supplier. He expects to sell 3,000 pairs next month He has signed a one-year lease for $50,000 A local television station offers to run a commercial for $10,000, announcing his grand opening When deciding whether or not to run this at, Santiago's sunk costs are OA $60.000 OB $100,000 OC $50,000 OD $170,000