YOU SAID:

they have the money I paid and a possible receipt so they know that I and everyone else paid

INTO JAPANESE

彼らは私が支払ったお金と領収書を持っているので、私と他のすべての人が支払ったことを知っています

BACK INTO ENGLISH

They know that I and everyone else paid because they have the money and receipts I paid

INTO JAPANESE

私が支払ったお金と領収書を持っているので、彼らは私と他のみんなが支払ったことを知っています

BACK INTO ENGLISH

They know I paid and everyone else because they have the money and receipts I paid

INTO JAPANESE

支払ったお金と領収書を持っているので、支払ったことを知っている

BACK INTO ENGLISH

I know I paid because I have the money and receipts I paid

INTO JAPANESE

支払ったお金と領収書があるので支払ったことを知っている

BACK INTO ENGLISH

I know I paid because I have the money and receipts I paid