theres this thing that a group of people i know do where they gather every month for fun, but in addition they all give 100$ to the host, and the host changes every month untill everyone has had their turn. so basically its a stupid way of saving money, or loaning if youre one of the first ppl to get their turn.

now i was thinking about if this would work if everyone could decide how much money they wanted to do it with? like this:
person A wants to do this with 200$
person B wants to do this with 300$
person C wants to do this with 100$

can they play the saving game? how would you calculate what each person should give to each other person every week? i tried to look online and apparently mexicans do this and its called tanda, but of course they use the same amount of $. ive been thinking about this for a while but cant really think of a proper solution