Skysong Company's record of transactions concerning part X for the month of April was as follows. (a1) Calculate average-cost per unit. Assume that, perpetual inventory records are kept in units only. (Round answer to 4 decimal places, es. 2.7682 .1 Average-cost per unit $ Compute the inventory at April 30 on each of the following bases. Assume that perpetual inventory records are kept in units of (1) First-in, first-out (FIFO). (2) Last-in, first-out (LIFO), (3) Average-cost. (Round final answers to O decimal places, es. 6.548.)