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The cost calculating formula combines city/highway mpg divided by the base MSRP. That number is then multipled by 1,000. This formula can be applied to any vehicle type, hybrid or not. A high mpg rating and low price yield a high efficiency-cost rating.
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The goal here is to pay the least for the most mileage, barring other considerations, like luxury options.
Here are the highest-ranked hybrid models based on their size and type, in descending order.(Credit: AP)