Calabogie Camera Shop Ltd. reports the following cost and net realizable value information for its inventory at December 31:

Cameras:	Units	Unit Cost	Unit NRV
Sony	4	$175	$160
Canon	8	150	152
Light Maters:
Gossen	12	135	139
Sekonic	10	115	110

a) Determine the lower of cost and net realizable value of the ending inventory

b) Prepare the adjusting journal entry required, If any, to record the lower of cost and net realizable value of the inventory assuming Calabogie Camera shop uses a perpetual inventory system

c) a physical inventory count at December 31 found that two of the Canon cameras were badly damaged. It was determined that they had no resale value. Prepare the adjusting entry required, if any, to record the damaged cameras.