Grunewald Industries sells on terms of $2/10,$ net $40.$ Gross sales last year were

$$4,562,500$ and accounts receivable averaged $$437,500.$ Half of the customers paid on the $10$th day and took discounts. What are the nominal and effective costs of trade credit to Grunewald$$s non$-$discount customers. $($Hint: Calculate the daily sales based on a $365-$day year, calculate the average receivables for discount customers, and then find the DSO for the non$-$discount customers.$)$