A 5 pound can of coffee costs $6.75. What is the “final cost”, the “unit”, and the “rate”?

Are you sure you have the question right? Five-pound cans of coffee cost much more than $6.75.

A 5 pound can of coffee costs $6.75. What is the “final cost”, the “unit”, and the “rate”?

Yes one can of coffee cost $6.75

OK.

Then $6.75 is the "final cost."

The unit is 5 pounds. Divide $6.75 by 5 to find the unit rate.

thank you here is another one

Three people attended a concert. Together it cost them $64.20.

What is wrong with the following statement?

“In the concert example, the “unit” is $64.20 and the “rate” is $21.40.”

What do you think is wrong with that statement?

it seems fair to me each persons pays 21.40 I am right?

Yes -- but you didn't answer the question.

What is wrong with the following statement?

“In the concert example, the “unit” is $64.20 and the “rate” is $21.40.”

are they talking about the unit being 3

Yes. The unit is 3.

thank you for helping me use I mind.