PLEASE show all calculations using excel formulas for the chart provided and explain each step. Thank you!

Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand is $$50\mathrm{.}00.$ Her best guess is that she can sell $300$ cups per week at $$0\mathrm{.}50$ per cup. The variable cost of producing a cup of lemonade is $$0\mathrm{.}20.$

a$.$ Given her other assumptions, what level of sales volume will enable Julie to break even?

b$.$ Given her other assumptions, discuss how a change in sales volume affects profit.

c$.$ Given her other assumptions, discuss how a change in sales volume and variable cost jointly affect profit.

d$.$ Use Excel's Formula Auditing tools to show which cells in your spreadsheet affect profit directly.

You are thinking of opening a Broadway play, I Love You, You're Mediocre, Now Get Better! It will cost