85% of transactions outside the hood are via CC/Debit and need no rounding up. Give an Nickel, Take a Nickel appears. Nothing left that even costs .50 cents below the counter. My stint in retail, Even in the 1990s we did not bother counting out drawers to the penny, we dumped them and pulled a rack of 100 for the setup unless it was apparent that they went +/- 300 pennies and ate into the margin of fat/short 3 dollars. 3 weeks after pennies are gone, we will be talking dollar and 5 dollar coins.
The only way to make coinage work again (which I support) is to revalue the dollar $1 new dollar -= $100 old dollars, or whatever the math dictates.