By measuring sales for exactly the same goods at competing sites, the book rankings provide the missing information.

There was also a slight decrease in gross margin, which measures sales minus the cost of producing goods.

Aston once measured annual sales in hundreds; now it is in thousands.

Some recent Government statistics, including those that measure retail sales, employment growth and home construction, are showing signs of weakness.

You should agree objectives and how you will evaluate campaigns - for example by measuring sales or carrying out market research.

Tower Records, the country's second-largest retail chain, is not included in the sample because its stores are equipped with different technology to measure sales.

Its gross margin, which measures sales minus the price of producing goods, was 68.8 percent.

Coke said its worldwide unit case volume, which is the way the company measures sales, increased 5 percent in the second quarter.

A main reason for the revisions is problems with measuring retail sales, which make up a large portion of the gross national product.

The most popular method of evaluation is to measure sales and/or market share before, during and after the promotion period.