Floyd Mayweather has opened up on how he wrangled himself out of contract limbo to bag himself $750million. There are not many boxers in the world who can boast the kind of record that Mayweather has – going 50-0 in an incredible career. It saw him win 15 major world championships across five different weight classes from super featherweight to light middleweight. But as well as dicing with the best in several weight divisions, the American was renowned for his jaw-dropping career earnings. Some of the total revenues of his big fights are difficult to comprehend with some including his clashes…