Lauren, a self$-$employed individual, used her personal car for business travel this year. She paid $$2,180$ for gasoline. If Lauren can provide written documentation for $3,100$ miles of business$-$related trips, what business expense amount can she deduct $($if any$)$ for these trips, considering her car's depreciation for full business use would have been $$4,800?$

James, who is self$-$employed, used his personal vehicle for business purposes. He spent $$1,900$ on gasoline. His car's depreciation for full business use would be $$4,300.$ James drove a total of $13,500$ miles during the year, with $2,600$ miles documented for business purposes. What business expense amount can James deduct $($if any$)$ for these trips?

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