On March 9, 2019, the Wall Street Journal published an article about online food shopping and delivery. One statement was The problem for Panera is that each delivery [has variable] costs [of] about $5 [including] labor, gas, and packaging. Yet to avoid turning away customers, it continues to charge a flat delivery fee of $3 per order in most markets, which means they must sell a lot more per order to absorb those costs. The article also states that, for grocery stores, It costs supermarkets an average of $10 [of new variable costs] an order to deliver food, but grocers only [charge an average of] $8 [in delivery fees] from customers. Explain why companies continue to offer online ordering and delivery even when the costs of the service are greater than the fees charged to customers.