Swifty Distribution markets CDs of numerous performing artists. At the beginning of March, Swifty had in beginning inventory 3,900 CDs with a unit cost of $7. During March, Swifty made the following purchases of CDs. March 5 4,875 @ $8 March 21 7,850 @ $10 March 13 6,825 @ $9 March 26 5,800 @ $11 During March 21,000 units were sold. Swifty uses a periodic inventory system. Calculate weighted-average cost per unit. (Round answer to 3 decimal places, e.g. 2.257.)