I need help writing a memorandum to the vice president of finance... Please help

Asap describe three different expenses associated with restaurants. choose one of these expenses, and discuss how a manager could handle this expense.

Aproduct has a demand of 4000 units per year. ordering cost is $20, and holding cost is $4 per unit per year. the cost-minimizing solution for this product is to order: ? a. 200 units per order. b. all 4000 units at one time. c. every 20 days. d. 10 times per year. e. none of the above

Economic models a. are constructed to mirror reality as closely as possible, and in this respect economic models are no different from other scientific models. b. are constructed to mirror reality as closely as possible, and in this respect economic models are very different from other scientific models. c. are simplifications of reality, and in this respect economic models are no different from other scientific models. d. are simplifications of reality, and in this respect economic models are very different from other scientific models.