QUESTION $3(20$ MARKS$)$ REQUIRED Study the information given below and calculate the following independently. Note: The expanded contribution margin model MUST be used to answer questions $3\mathrm{.}1,3\mathrm{.}2$ and $3\mathrm{.}4.3\mathrm{.}1$ Break$-$even quantity $(4$ marks$)3\mathrm{.}2$ Total Contribution Margin and Operating Profit$/$Loss$,$ if the variable manufacturing costs are $10\%$ higher than forecasted $(4$ marks$)3\mathrm{.}3$ The margin of safety $($expressed as a percentage to two decimal places$)$ using the breakeven value $(4$ marks$)3\mathrm{.}4$ The sales volume required to earn an operating profit of R$715000,$ if the sales price is reduced by R$10$ per unit $(4$ marks$)3\mathrm{.}5$ The selling price per unit $($expressed in rands and cents$)$ that will enable Zampa Manufacturers to break even. $(4$ marks$)$ INFORMATION

Zampa Manufacturers manufactures and sells one product and the following forecasts apply to $30000$ units of the product that are expected to be manufactured and sold during $2025$:

$\backslash$begin$\{$tabular$\}\{|$l$|$r$|\}$

$\backslash$hline & $\backslash$multicolumn$\{1\}\{|$c$|\}\{$ R $\}\backslash \backslash$

$\backslash$hline Sales & $3000000\backslash \backslash$

$\backslash$hline Direct materials cost & $700000\backslash \backslash$

$\backslash$hline Direct labour cost & $600000\backslash \backslash$

$\backslash$hline Variable manufacturing overheads cost & $200000\backslash \backslash$

$\backslash$hline Fixed manufacturing overheads cost & $280000\backslash \backslash$

$\backslash$hline Fixed administration and marketing cost & $400000\backslash \backslash$

$\backslash$hline Variable marketing cost $($calculated at $10\backslash \%$ of sales$)$ & $\backslash (?\backslash )\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$