do u mean one account can only have one smart contract?

what about every entry in the table, can i bill them to each user specifically?? Or the person that owns the contract pays for everything

Okay! Thanks for your detailed explanation!!!

I would like to ask a slightly unrelated question. so one of the required method for a smart contract is emplace, which is to assign the RAM usage to an account , can we assign it to a smart contract which in turns assigns it to an account instead? Basically, can a smart contract emplace another smart contract instead of a user?