stuck on this accounting question

The following data relates to an item of raw material: Cost of raw material E10.00 per unit Usage per day 170.00 units Minimum lead time 20 days Maximum lead time 30 days Cost of ordering material $600.00 per order Holding costs 10% per annum N.B. Assume that each year consists of 48 working weeks of 5 days per week. Measure the re-order quantity? (please put the answer as the number only and use two decimal places)