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Sounds like a tough problem to solve, Camron. I just looked up my zip code, and it covers ...oh probably 2-3% of the state. My town is near the edge. Utah is kind of unusual in that the majority of the population live within a fairly narrow corridor running north/south through the center of the state. So the state is framed by huge zip code areas. And since I normally only get mileage when traveling to rural schools, that would seem to make the worst case scenario, the norm.
BTW, would it make more sense to calculate mileage once for each assignment and cache it, rather than calc it on the fly?
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"It is not enough to do your best; you must know what to do, and then do your best." - W. Edwards Deming
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