How much is a Second Class stamp? <a href=" http://iacs.org.br/can-i-buy-ciprofloxacin-over-the-counter-uk.pdf#brisk ">can i buy ciprofloxacin over the counter uk</a> The gas can be either compressed natural gas (CNG) or liquefied petroleum gas (LPG). Ford says that the lower cost of natural gas -- about the equivalent of $2.11 per gallon of gasoline -- means that customers will be able to save money within 24 to 36 months of ownership, even though they will have to pay nearly $10,000 more for the option.