Carla sells hot coffee, cider and tea from a sidewalk cart near Wall Street in New York City Last month she sold $4,000 worth of product to 1,000 customers. She spent $900 on buying her beverages in bulk. Her monthly costs are: Utilities =$100, Salary = $2,000, Advertising = $0, Insurance = SO, Interest=SO, Rent (cart) = $600, Depreciation = $0.(2 points each) 8.1 What is Carla's monthly cost of goods sold? 8.2 Calculate Carla's average sale per customer 83 Calculate Carla's monthly profit