Perlodicinventory by three methods Dymac Appliances uses the periodic inventory system. Details regarding the inventory of appliances at January 1, purchases invcices during the next 12 months, and the inventory count at December 31 are summarized as follows: Required: 1. Determine the cost of the inventery on Decemper 31 by the first-in, finst-out method. If the inventery of a particular modei comprises one entire purchase plus a portion of another purthave asquired at a diflerent une cont, use a separate line for each purchase, If units are in imventory at two different conts, enter the units PUAOGSEO MOST RECENTLY PrSL