Most of the required important information's are already given in the question. Based on those given information's the answer to the question can be easily reached.
The cost of 3 pounds of gummy bunnies = $4
Then
The cost of 1 pound of gummy bunnies = (4/3) dollars
So
The cost of 2 pounds of gummy bunnies = (4/3) * 2 dollars
= 8/3 dollars
= 2 2/3 dollars
= 2.67 dollars
So the cost of 2 pounds of gummy bunnies is 2 2/3 dollars or $2.67. I hope the procedure is simple enough for you to understand.