JUST FUN... I need a definition for Low, Medium & High Sale !

Hi Guys,

Being a Author over here, I just want to know how fellow authors scale their daily sales volume as Low, Medium & High Sales.

My definition as follows…

If I earn above $40 on a Day, I feel that is a High Sale (!!!). Between $20-40 which is Medium Sales. Anything below $20 is low.

Just a curiosity how others scale their sales…JUST FUN!!!