Young Bobby opened a lemonade stand in his front yard. He used $4 worth of lemons, sugar, and cups, and paid his little sister $1 to operate the stand while he played. She sold 7 cups of lemonade for $1 each. What was the surplus value?

Question

Quizplus · Accepted Answer

The revenue from selling 7 cups of lemonade at $1 each is $7. 
The cost of supplies and paying his sister is $4+$1=$5. 
Therefore, the surplus value is $7-$5=$2. 
Hence, the best answer is D.

Young Bobby Opened a Lemonade Stand in His Front Yard