Vaughn Company uses a periodic inventory system. For April, when the company sold 540 units, the following information is available. Units Unit Cost Total Cost April 1 inventory 220 $25 $5,500 April 15 purchase 380 30 11,400 April 23 purchase 400 33 13,200 1,000 $30.100 (a) Calculate weighted average cost per unit. (Round answer to 2 decimal places, e.g. 2.76.) Weighted average cost per unit $