• Dell average gross margin for 2015-01-31 was 0%, a 0% decline from 2015-04-30.
• Dell average gross margin for 2015-04-30 was 0%, a 0% decline from 2015-07-31.
• Dell average gross margin for 2015-07-31 was 0%, a 0% decline from 2015-10-31.

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.