How would one write the following officially? I was wondering how would a contract in Chinese state that:

Utilities (gas, water and electricity) are 200 every month and will be settled with a final settlement at the end of the year.


EDIT -


So what I have tried so far is: 水, 電, 油費 應該每月支付, 年末


I am not sure whether there is a word for utilities that is commonly used. I hear 水電費 more often, but that does not include gas.
In English I use the word should more often, but I don't see that being used in contracts.
In addition, the last issue is, I don't know how to say a final settlement.
see e.g. LINE dictionary examples:utilities:水电费都包括吗？ 租金含水电费吗, gas: 我去缴纳 煤气费 every month 每月首日支付租金 settled at end: 每年年底结帐 final settlement date 到期日 suggestion as follows:

每月支付煤气水电费２００美元（？）以年底到期日结帐  (to be settled at end of year settlement date)

added 6/3/19: another term for "gas" 燃气费