Room 1 has 50,000 square feet of rentable space. Room 2 account for 30,000 square feet and lobby area is composed of 20,000 square feet. They have a sales amounting to $130,000;$70,000; and $0 respectively and a cost of $60,000;$20,000; and $50,000. How much should be allocated to Lobby, based on Room size? Select one: a. $0 b. $10,000 C. $15,000 d. $25,000