elegant transfort has a delivery van that was purchased on february $1.2019,$ for $$90,000.$ the van had been depreciated on a straight$-$line basis with an estimated residual value of $$10,000$ and an edtimated useful life of six years. elegant transfort has a december $31$ year end. assume each of life. following four independent situations: $1$ on february$1,2024,$ elegant transport retires the van. $2$ on june$1,2023$ elegant transport sells the van for $12,000$ cash. $3$ on september $1,2023$ elegant transport sells the van for $12,000$ cash. $4$ on october $1,2023$ elegant transport exchanges the old van. plus $$55000$ cash, for a new van. the old van has a fair value of $$12,000.$ the new van has a list price of $$65,000,$ but the dealer gives elegant transport a$15,000$ trade$-$in allowance on the old van.. prepare the journal entry to record each of these situation