Wells FargoBy now, we've all heard that oil prices have plummeted over the last several months, which has made things tough for major energy-producing economies like Saudi Arabia and Texas.
But it's great news for the average American consumer because lower oil prices means lower gas prices - and lower gas prices means a rise in disposable income.
This chart from Wells Fargo Securities shows just how much each income group in the US will save over a year because of lower gas prices.