I see nowhere in this statute where it refers to the “price” of the property. They didn’t pay for 5 gallons and take 10(amount of property) nor did they pay for water and then take gas (the nature of the property). And “reasonable measures” is a door big enough to drive a dump truck through.
They paid for 5 gallons, as you put it, ($16.50), and took 50.152 gallons ($16.50).