It successfully negotiated credit terms of $4\mathrm{.}5/10$ net $60$ days with its creditors whilst credit terms of $2/10$ net $30$ days were granted to debtors. The purchase cost of the product sold by Nordic Limited was R$100$ per unit. The cost of keeping each unit in inventory was $10\%$ of the unit cost. The cost of placing an order for the product was R$30.$ The selling price was R$140$ per unit and the sales for the year totalled $52000$ units, of which $90\%$ was on credit. The company purchased $60000$ units of which $80\%$ was on credit. It took approximately $10$ days for the goods to be delivered to Nordic Limited each time an order was placed with the supplier. Nordic Limited was open for business for all the days in $2023$ except for the weekends. On $31$ December an amount of R$600000$ was owed to suppliers for goods purchased on credit whilst an amount of R$500000$ was owed by customers for credit sales. The company had an inventory turnover of $18\mathrm{.}25$ times.

Calculate the cost $($as a percentage expressed to $2$ decimal places$)$ to Nordic Limited of not accepting the settlement discount offered by suppliers