Undefeated boxer Floyd Mayweather said on Monday that he expects to earn as much as $70 million from his May 3 fight against Marcos Maidana.

In an Instagram post, Mayweather, 37, included a full breakdown of his total payout, which revealed that he earned $32 million for 36 minutes of in-ring action. In other words, he earned $14,815 per second, $888,889 per minute and $2,666,667 for every round of his bout against Maidana.

But the payout that Mayweather earned for fighting Maidana is just a fraction of his total earnings. He’s also going to receive a share of the event’s pay-per-view revenue. By the time that figure is tabulated, Mayweather expects to earn a total of $70 million.

“$32,000,000.00 for 36 minutes. I'm waiting for the PPV numbers to come in so I can make another $38,000,000.00 on the back-end... making it a grand total of $70,000,000.00,” he wrote on Instagram.

By comparison, Maidana earned a guaranteed $1.5 million, plus money from Argentinian television rights and a share of the event's pay-per-view revenue, Forbes reported. The fight itself produced $15 million in on-site revenue, the fourth-largest live gate in the history of Las Vegas boxing.

Despite suffering a cut for the first time in his career, Mayweather defeated Maidana by majority decision (114-114, 117-111. 116-112). Maidana outpunched his opponent, throwing 858 punches to Mayweather’s 426. However, Mayweather landed 230 of his punches, compared to just 221 for Maidana.

Mayweather is halfway through a six-fight, $200 million contract he signed with Showtime in 2013. The quality of his fight against Maidana has some fans calling for a rematch between the two fighters later this year.

“If the fans want to see it again, we’ll do it again,” Mayweather said, via Forbes.