Helen and Ivan

This phrase will invoke fear into the minds of any Primary 6 (A 12 year old) who has ever attempted this dangerous question because of how ridiculously difficult it is (MOE pls don't sue me)

Here's the question:

Helen and Ivan had the same number of coins. Helen had a number of 50-cent coins and 64 20-cent coins.

These coins had a mass of 1.134 kg.
Ivan had a number of 50-cent coins and 104 20-cent coins.
Question 1: Who has more money in coins and by how much?
Question 2: Given that each 20-cent coin is 2.7 g heavier than 50 cent coin, what’s the mass of Ivan’s coins in kg (kilograms)?

Teacher: Ok guys lets try this question!
Students: *Sees Helen and Ivan in the question*
Students: *Faints*
Students: I HATE MATH