Sarah, who is self$-$employed, used her personal car for business travel. She paid $$1,700$ for gasoline. If Sarah can provide written documentation for $2,200$ miles of business$-$related trips, what business expense amount can she deduct $($if any$)$ for these trips, considering her car's depreciation for full business use would have been $$3,800?$

Michael, a self$-$employed individual, used his personal vehicle for business purposes this year. He spent $$2,250$ on gasoline. If Michael can provide written documentation for $3,400$ miles of business$-$related trips, what business expense amount can he deduct $($if any$)$ for these trips, given that his car's depreciation for full business use would be $$4,700?$

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