Naidoo $($Pty$)$ Ltd uses the EOQ model to determine the quantity of raw material to order. The following details are available: Average usage per week

Number of production weeks per year

Purchase price per unit of the raw material

Cost of placing an order

$9000$ units

Costs of carrying one unit of the raw material per year

$75$

R $37,50$

R$60,00$

$R9,00$

The EOQ that Naidoo $($Pty$)$ Ltd should order is$?$

$$ a$.3000$

b$.7725$

c$.4800$

d$.3900$