Amanager must make a decision on shipping. there are two shippers, a and b. both offer a two-day rate: a for $526 and b for $532. in addition, a offers a three-day rate of $470 and a nine-day rate of $411, and b offers a four-day rate of $459 and a seven-day rate of $412. annual holding costs are 34 percent of unit price. three hundred and fourty boxes are to be shipped, and each box has a price of $148. which shipping alternative would you recommend? (round your intermediate calculations to 3 decimal places and final answers to 2 decimal places. omit the "$" sign in your response.) a b option cost option cost 2 days $ 2 days $ 3 days $ 4 days $ 9 days $ 7 days $ a. ship three-day using a b. ship two-day using b c. ship four-day using b d. ship seven-day using b e. ship two-day using a