1.]..... You run a hospital with 100 rooms. Fixed daily cost is $1000 which includes staff salary, property charges, maintenance etc. Variable cost per room is $10 which includes cleaning, equipment rentals, utility cost etc. which is incurred only when the room is full. You charge $50 per room per day. You sold 30 rooms today, how much profit/loss did you earn for today. 2.] .... A vendor sells hotdogs at $15 /piece . For every hot dog he spends $12 in the raw material. Additionally , he spends $ 1 for packing each hotdog and monthly $50, $20, $10 as food truck rent, electricity and other expenses respectively . How much is the vendor contributing to covering his fixed costs or generating profits ( contribution margin)