The following units of an inventory item were available for sale during the year: Beginning inventory 10 units at $47 First purchase 18 units at $48 Second purchase 23 units at $50 Third purchase 14 units at $52 The firm uses the periodic inventory system. During the year, 26 units of the item were sold. The value of ending inventory rounded to the nearest dollar using average cost is (Round average cost per unit to three decimal place.) Oa. $1.927 Ob. $1,222 Oc. $1,238 Od. $1.328