Look at Little Bertha's page (the Saturn SL2). All-time gallons consumed is 3208.23, and all-time total spent is $8,530.78. So shouldn't the all-time average price per gallon be given by $8,530.78/3208.23 = $2.6590 = $2.66 to the nearest penny? And if so, why is the all-time average price per gallon under "Cost Analysis" showing $2.67?
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