Once there was a prostitute who had three different rates based on the
following three conditions :-

1) $10.00 for a Spin on the grass
2) $20.00 for a Spin on the couch
3) $30.00 for A Spin on the bed

So, it's in the morning when a Mexican walks in and slaps a $10 bill on the table. They go out and take a spin on the grass.

Around noon, an American walks in and slaps a $20 bill on the table. They go to the couch for a "spin" .

About the end of the day, an Indian walks in and slaps a $30 on the table.

Happy from seeing the money she says, "Wow, you have class".

The Indian responds, "Class...my foot..... Three times on the grass"