Helen and Ivan had the same number of coins. Helen had a number of 50-cent coins, and had 64 of 20-cent coins. These coins had a mass of 1.134 kg. Ivan had a number of 50-cent coins and 104 of 20-cent coins.
1) Who has more money in coins and by how much?
2) Given that each 50-cent coin is 2.7 g more heavier than a 20-cent coin, what is the mass of Ivan’s coins in kilograms?
(For added context, 100 cents is equal to 1 dollar).