MetaOnslow Company purchased a used machine for $$288,000$ cash on January $2.$ On January $3,$ Onslow paid $$10,000$ to wire electricity to the machine. Onslow paid an additional $$2,000$ on January $4$ to secure the machine for operation. The machine will be used for six years and have a $$34,560$ salvage value. Straight$-$line depreciation is used. On December $31,$ at the end of its fifth year in operations, it is disposed of$.$

$3.$ Prepare journal entries to record the machine$$s disposal under each separate situation: $($a$)$ it is sold for $$21,000$ cash and $($b$)$ it is sold for $$84,000$ cash.