Public capital subsidies run $20 to $25 billion yearly, yet the total subsidy per affordable unit is not tracked anywhere.

As food prices rise, economists suggest using unit pricing to save money. Unit pricing breaks down the cost of an item by a standard measurement, like per ounce or pound. This strategy allows shoppers ...

Unit pricing makes comparing products—from one brand to the next or between different sizes—more like comparing apples to apples, so it's easier to see which item really saves you the most money.

If you carry a cell phone, you also have a calculator. Pretty much every mobile phone on the market has one, so you have no excuse not to do some intelligent per-unit math while you're out shopping.