Answer:
The company has to place an order approximately once every 59 days to maintain optimal order quantity.
Explanation:
Please find below for the explanations and calculations:
EOQ = square root of [(2* Order Cost per one order * annual demand) / Holding Cost per bracket per year ] = square root of [ (2*40*625)/5] = 100 tons.
Orders made annually give EOQ = Annual demand / EOQ = 625 / 100 = 6.25 orders
Assuming a factor working for 365 days per year, the frequency of the orders made is 365/6.25 days or 59 days.