Amanda, a self$-$employed professional, used her personal car for business trips this year. She incurred $$2,300$ in gasoline expenses. Her car's depreciation for full business use would be $$5,000.$ Amanda drove a total of $14,500$ miles during the year, with $2,800$ miles documented for business purposes. What business expense amount can Amanda deduct $($if any$)$ for these trips?

John is self$-$employed and used his personal vehicle for business purposes this year. He spent $$2,050$ on gasoline. John's car depreciation would have been $$4,400$ if fully used for business. If John can provide written documentation for $2,900$ miles of business$-$related trips, what business expense amount can he deduct $($if any$)$ for these trips?

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