A mail order uses $18,000$ boxes a year. Carrying cost are $51$ cent of a box cost price and ordering cost are RM$97$ per order. The following price schedule as shown in Table $1$ is applied. Determine the order quantity that will be minimized the total cost.

Table $1$

Number of boxes Price per box

$\backslash$table$[[1000$ to $1999,$RM$1\mathrm{.}25],[2000$ to $4999,$RM$1\mathrm{.}20],[5000$ to $9999,$RM$1\mathrm{.}15],[10000$ and more,RM$1\mathrm{.}10]]$

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