What is 978 cm3 expressed in l? 0.978 l 9.78 l 97.8 l 978,000 l

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.