Bigger isn’t always cheaper. On Amazon, larger packs can cost more per unit than smaller ones. Different sellers price each ...

Understanding the components of your company's sales is important for budget-planning purposes and for efficiently marketing your products. Per-unit price is one way of differentiating between ...

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.