Johnson Limited sells office equipment on September 30, 2012, for $42,000 cash. The office equipment originally cost $144,000 when purchased on January 1, 2009. It has an estimated residual value of $4,000 and a useful life of five years. Depreciation was last recorded on December 31, 2011, the company's year end. Prepare the journal entries to

(a) Update depreciation using the straight-line method to September 30, 2012,

(b) Record the sale of the equipment.