4 lbs of dollars

Took Audrey (2-1/2 yrs old) out to lunch today and when we got out check she said “is that our bill?” 

Me – Yes. Do you know how much it is?

Audrey – 4 pounds. 

Me – 4 pounds of what?

Audrey – 4 pounds of dollars. 

Wow, that was an expensive lunch!😂😂