Which Sunderland kit sponsor has made the most cash for SAFC?
But while shirt sales add to football clubs' coffers, millions more is made on sponsorship deals for their official kit.
SAFC has made Â£39.5million since the 09/10 season, according to data from Statista.
The highest amount listed for Sunderland came from the 2012/13 season, where Tullow Oil promoted the Invest in Africa initiative - paying Â£20million to have the slogan emblazoned on the club's kit.
It was the first time in English football that a sponsor promoted a cause rather than a commercial product to the Premier League’s then worldwide audience of 4.7billion people.
Here is a breakdown of cash raise from club sponsorship, as published by Statista:
2009/10 - Boylesports, Â£2.5million
2010/11 - Tombola, Â£1million
2011/12 - Tombola, Â£1million
2012/13 - Invest in Africa, Â£20million
2013/14 - Bidvest, Â£5million
2014/15 - Bidvest, Â£5million
2015/16 - Dafabet Â£5million