Your organisation, Carlisle Limited produces one product that is sold for $N$$$125$ ?per unit and each of these units has variable costs as follows:

$9$ ?hours' labour at $N$$$6\mathrm{.}50$ ?per hour

Royalties at $N$$$4\mathrm{.}50$ ?per unit

$14$ ?square metres of material per unit at $N$$$3\mathrm{.}60$ ?per square metre

The fixed costs of Carlisle Limited are $N$$$38,000.$

You are required to calculate the following:

a$)$ ?The contribution per unit towards the fixed costs of the organisation. $(5$ ?marks$)$

b$)$ ?The number of units that would have to be produced to earn the organisation a profit of $N$$$44,000.$

$(6$ ?marks$)$

c$)$ ?The profit earned if the organisation sells $24,600$ ?units.

$(6$ ?marks$)$

d$)$ ?The profit earned if the selling price is reduced to $N$$$115$ ?and the demand rises to $36,400$ ?units sold.

$(8$ ?marks$)$