More bullshit from the lying BS pontificator.Not always. Corporations often have inflated prices to a point their economists have figured will make them the most profit, so in that case, an increase in 'cost of production' does not automatically result in a 1 for 1 cost increase, sometime no increase, just a little less profit for the corporation.
See above for the factual answer already given on the price of gasoline.
Factors affecting gasoline prices - U.S. Energy Information Administration (EIA)
The major factors that affect gasoline prices and the components of retail gasoline pump prices.