Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand is $50.00. Her best guess is that she can sell 300 per week at $.50 per cup. The variable cost of producing a cup is $0.20.

What level if sales volume will enable Julie to break even?

How a change in sales volume affects profit?

How a change in sales volume and variable cost jointly affect profit?

Use excel auditing tools to show which cells in spreadsheet affect profit?