find the number of post required to fence around a rectangular plot of land which is 55 m by 30 m if the post are 5m apart​

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.