Grocery inflation has been cooling sharply, but Tamira Flamer, 27, says she hasn’t noticed. What she knows is that paper plates and meat remain more expensive than they were a few years ago.

“I feel like it’s been rough,” said Ms. Flamer, a mother of two who drives for Amazon, while standing outside a Dollar General near her home in Norristown, Pa., on Sunday.

Ms. Flamer, an undecided voter who says she is most focused on economic issues, underscores a challenge for Vice President Kamala Harris as the presidential election barrels toward its final days.

Voters say that they are very focused on the economy as they head to the polls, yet surveys suggest that they feel relatively glum about its recent track record. That could hurt Ms. Harris while helping her opponent, former President Donald J. Trump.

The lingering pessimism is also something of a puzzle. The job market has been chugging along, although more slowly, overall growth has been healthy and even inflation is more or less back to normal. Fresh data set for release on Thursday are expected to show that prices increased by a mild 2.1 percent over the past year.

Confidence has crept back up as inflation has cooled, but it remains much lower than it was the last time the economy looked as solid as it does today. That is true for both the University of Michigan’s confidence index and a separate measure produced by the Conference Board, an organization that conducts business and economic research.