Utility, to me, would be dollars or "happiness points." And sometimes you can use dollars to "buy happiness points."

Like, for instance, I have the choice to go to the amusement park or to the movies. The amusement park costs $20 while the movies cost $10. If I go to the amusement park, I go with a group of friends that I really enjoy. Also, I enjoy the amusement park more. The amusement park trip is worth 30 happiness points.

When I go to the movies, I go with one friend that is meh. Also, the movie will probably just be OK. The movies are worth 15 happiness points.

Let's make one dollar and a happiness point equal in terms of utility.

I lose 10 utility units to go to the movies but gain 15 for a net of 5.
I lose 20 utility units to go to the amusement park but gain 30 for a net of 10.
I obviously choose to go to the amusement park every time.

Obviously, this question was simplified for mathematics sake. Most people value money more than I do making my dollar to "happiness point" ratio pretty low. But yeah, there.