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Movelt Corporation is the world's leading express$-$distribution company. In addition to its $643$ aircraft, the company has more than $57,000$ ground vehicles that pick up and deliver packages. Assume that Movelt sold a delivery truck for $$27,000.$ Movelt had originally purchased the vehicle and recorded it in the Truck account for $$45,000$ and had recorded depreciation for three years.

$2.$ Using the following structure, indicate the effects $($accounts$,$ amounts, and $+$ for increase and $-$ for decrease$)$ of the disposal of the truck, assuming Accumulated Depreciation$-$Truck was $($a$)$ $$18,000,($b$)$ $$12,000,$ and $($c$)$ $$21,000.($Enter any decreases to Assets, Liabilities, or Stockholders' Equity with a minus sign.$)$