A Catering Service Has Contracts with a Number of Customers

A catering service has contracts with a number of customers to supply lunches on a daily basis.The chef has complained of the long hours she must work to prepare all of these lunches and has threatened to quit.It would be very difficult,if not impossible,to replace the chef.To reduce the pressure on the chef,some contracts may have to be cancelled.(The catering service can cancel any contract with seven days notice. )To help make this decision,the profitability of each customer should be measured by dividing the daily incremental profit from serving each customer by the amount of the time it takes the chef each day to prepare the customer's meals.