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The month is based on the moon, which completes its phases in roughly 29.5 days, which is roughly a month. It is used to help keep track of time.
It is based roughly on the medieval period, though with a fantasy twist.
Yes, the protein based Apitoxin is slightly acidic (roughly pH 5).
Very roughly 2.2 mpg based on specified fuel burn and cruse speed
Mint condition. $40,000-$45,000 roughly. Then devalue it from there based on condition and originality