And forget American Express as it is too expensive to the shop keeper.

FORBES: Cash Is Zeus: A Postcard From Greece

The paint shop is the most expensive, and most polluting, aspect of any automotive factory, and is often the source of production bottlenecks.

FORBES: GM Showers Kansas City With One Of Its Largest Factory Investments Ever

Cartridges are expensive, but the change made the paint shop more efficient.

FORBES: Companies, People, Ideas

Due to my special diet, I shop exclusively at Whole Foods, which can be more expensive, but I also save by cooking breakfast, lunch and almost all dinners during the week.

FORBES: 4 People Dish: How I Spend My $60,000 Salary

Gone are the days when shop assistants might hover over a customer's shoulder to check that expensive volumes were not just being read and then put back on the shelf.

ECONOMIST: The book trade