there shall be paid by the exempt organization $20 for each day during which such failure continues. The maximum penalty under this subparagraph on failures with respect to any 1 return shall not exceed the lesser of $10,000 or 5 percent of the gross receipts of the organization for the year. In the case of an organization having gross receipts exceeding $1,000,000 for any year, with respect to the return required under
section 6033 for such year, the first sentence of this subparagraph shall be applied by substituting “$100” for “$20” and, in lieu of applying the second sentence of this subparagraph, the maximum penalty under this subparagraph shall not exceed $50,000.