A soda depot had 30,816 sodas which were packed in crates. Each crate contained 24 sodas. The mass of an empty crate was 2kg and that of a full crate 12kg. a) How many crates were there? b) What was the total mass of empty crates? c) What was the total mass of sodas alone? d) A lorry was hired to transport the crates at a cost of Sh 5 per crate of soda per trip. The lorry could only carry 107 crates per trip. How much money was spent on transporting all the crates?