Additional data regarding the company's sales of snowboards are provided below. Assume that REI uses a perpetual inventory system. Calculate the weighted-average unit cost. (Round answers to 3 decimal places, e.g. 5.125.) September 1$ September 5$ September 12$ September 16$ September 19$ September 26$ September 29 REI sells snowboards. Assume the following information relates to REl's purchases of snowboards during September. During the same month, 101 snowboards were sold