please provide a detailed working

9. Fairy Gardens Ltd uses a periodic inventory system with the weighted average method of cost assignment. The following data are available. Date Units Unit Cost Total Cost Beginning inventory Jan 1 500 $10 $ 5 000 Mar 15 1500 $12 $18 000 Purchase Purchase June 8 2000 $13 $26 000 Ending inventory Dec 31 1000 The cost of the ending inventory to the nearest dollar is: $ 5 000. a. b. $12 250. c. $13 000 d. $49 000