How to use "extra" in a sentence

I also have a full water bottle and an extra two litres in a CamelBak.

Hundreds of extra police patrolled the area, some dressed as women

I can see that all those units and the extra money would be useful

"Once you've got all those energy units and extra money, you are free

"The casino bosses will like it too, 'cause a lot of our high rollers will probably make an extra trip this year

He'll just add on an extra trip for his anniversary

The big man had been overconfident, certain that his six-inch advantage in height and his extra eighty pounds of muscle made him unbeatable

I received a death threat by phone the night before the arbitration - I can't say for certain that it was from the writer; the voice was so deep that it might have been his mother - and the next morning the law firm handling the studio's case assured me that they had taken extra security measures for the meeting