Small Question about 5% royalties

“Once you’ve begun collecting money for your product, you’ll need to track gross revenue and pay a 5% royalty on that amount after the first $3,000 per game per calendar quarter.”

so what I understand is that when the game earns more than 3000 dollars in three months (jan-march), then I pay 5% royalty of what is additionally earned above that 3000 dollars limit. But when the game earns less than 3000$ the next three months (april- jun), does the 5% royalty still apply somehow?

Subtract $3,000 from what you make in quarter, pay 5% of the remainder (if any)