• Tesco average gross margin for 2012-02-29 was 0%, a 0% decline from 2012-08-31.
• Tesco average gross margin for 2012-08-31 was 0%, a 0% decline from 2013-02-28.
• Tesco average gross margin for 2013-02-28 was 0%, a 0% decline from 2013-08-31.

Gross margin can be defined as a company's total sales revenue minus its cost of goods sold, divided by the total sales revenue, expressed as a percentage.