A particular job requires $100kg$ of materials @ R$63\mathrm{.}75$ per kg and $25$ direct labour hours @ R$255$ per hour. Overheads are recovered on the basis of kg used, at R$51$ per kg$.$ A profit mark$-$up of $60\%$ is added.

What is the price chargeable to the customer?

$(3$ Marks$)$

$$ a$.$ R$35700$

b$.$ R$20706$

c$.$ R$17850$

d$.$ R$28560$