A manager must make a decision on shipping. There are two shippers, A and B. Both offer a two-day rate: A for $512 and B for $521. In addition, A offers a three-day rate of $478 and a nine-day rate of $401, and B offers a four-day rate of $460 and a seven-day rate of $414. Annual holding costs are 40 percent of unit price. Three hundred and seventy boxes are to be shipped, and each box has a price of $150. Which shipping alternative would you recommend?