Deshi Industries plans to manufacture gas stoves and the following information is applicable:

Estimated sales for the year $3000$ units at R $450$ each

Estimated costs for the year:

Variable costs R$320$ per unit

Factory overheads $($all fixed$)$ R$80000$

Administrative expenses $($all fixed$)$ R$30000$

$1\mathrm{.}1$ Calculate the:

$1\mathrm{.}1\mathrm{.}1$ Total operating profit for the estimated figures.

$1\mathrm{.}1\mathrm{.}2$ Break$-$even quantity

$1\mathrm{.}1\mathrm{.}3$ Break$-$even value

$1\mathrm{.}1\mathrm{.}4$ Margin of safety in units.

$1\mathrm{.}1\mathrm{.}5$ Target sales volume to achieve a profit of R$50000.$

$1\mathrm{.}2$ The sales manager is of the opinion that a greater profit will be made if the selling price is decreased by $10\%$ as sales volume will then increase by $10\%.$ Calculate the total operating profit at the new selling price and advice management whether to implement this suggestion. $(4)$