Black Friday sales were a bit of a dud this year, but that doesn’t mean 30,000 online shoppers were not moved to purchase pieces of poop — actual poop — because they were.

The creators of the popular — and totally NSFW — card game “Cards Against Humanity” sold just one item on their store on Black Friday: a small box of feces.

Max Temkin, one of the game’s creators, didn’t think it would sell more than 1,000 units. Instead, some 30,000 people placed an order through the website. The $6 item was labeled as “literal feces, from an actual bull.”

It turns out, at that cost, you can’t get rich making poop (though the card game is another story).

“The manufacturing cost and mailing cost of making it was $5.80,” Temkin said. “We’re not trying to make money off this.”

The company ended up making about a $6,000 profit through the Black Friday poop sales, 100% of which was donated to Heifer International, a charity that provides livestock and training to developing communities.

“We bought about a dozen heifers for families that will be able to turn that into a source of income,” Temkin said.

Here is a breakdown of how much it cost the company to sell poop, per unit:

Item Type Cost Box $1.55 Commemorative Scratch and Sniff Button $0.31 Freight $0.16 Postage $0.20 Handling $2.32 Credit Card Fee $0.68 Custom Cardboard Shipping Box $0.31 Poop $0.27 Total $5.80

Deciding how many items to make is actually a carefully calculated process, Temkin said. The eight game makers mutually make decisions initially founded on an informal poll.

“We ask everyone what is their tolerance for risk,” he said. “We try to predict how much we’re going to sell.”

From there, they go back and adjust numbers based on actual data.

“It’s such a silly thing because it’s just poop, but we have people on our team who are actual statisticians,” he said.

The company posted the poop as a Black Friday prank.

“Black Friday is a terrible day,” said Temkin. “Everybody hates Black Friday.”

But Temkin says there is more to buying the poop than meets the eye.

“The value people get out of it, it’s not about getting the poop,” he said. “It’s participating in the public joke. People aren’t buying it because they’re desperate to have a box of poop. It’s the process of buying poop, and $6 is pretty cheap for a good laugh.”

Don’t cry for those possibly unwitting customers, though: The item is fetching $36 on eBay. Talk about ROI.

People paid $6 for this. Now they want to resell the poop for more money. R u serious bro? EBay

Some shoppers must have assumed there would have been something else inside the box — or so one would think. But Temkin assured them via Twitter, it was real.

The Cards Against Humanity company started in one of the game creators’ basement.

“It was a joke that went out of control,” Temkin said.

He said the creators pride themselves on not being a big company and not having to do things the traditional way. So what’s his advice for other entrepreneurs?

“The thing about asking for advice is that the people who give it are always full of s—,” Temkin said. “The only honest answer is no one knows why they are successful. There’s always this confused correlation and causation.”

Instead, he attributes his success to luck.

“It’s being at the right place at the right time,” he said. “And it’s privilege. We went to an amazing school and had great resources.”

Temkin does have a box of poop of his own, which has been sitting on his desk for months.

“I don’t like it,” he said. “But I don’t know what to do with it.”