Question $1$ SU Bakery is a student$-$led venture specialising in muffins. The annual fixed cost for the business is $18,000.$ Variable costs, including ingredients and labour to produce a muffin amount to $0\mathrm{.}90.$ Muffins are sold for $3\mathrm{.}20$ each. a$)$ If the bakery sells $12,000$ muffins annually, determine the total cost, total revenue and profit. $[4$ marks $16\%]$ b$)$ How many muffins will need to be sold to break$-$even? $[2$ marks $8\%]$ c$)$ If the maximum operating capacity of the business is $12,000$ muffins annually, determine the break$-$even volume as a percentage of capacity. $[2$ marks $8\%]$ d$)$ If the retail selling price is lowered to $2\mathrm{.}75,$ what effect will this have on the break$-$ even volume? $[4$ marks $16\%]$ e$)$ Build a spreadsheet of this break$-$even problem which captures all of the answers to parts a$)$ to d$).$ Your answer should include screenshots of both the model results view and the formula view, along with some explanatory notes as needed. If $$Solver$$ is used in answering this question, a screenshot of the $$Solver$$ parameter screen must also be included in the answer. $[13$ marks $52\%]$