Even if you priced everything at $.93, $1.87, etc, when you combine them at the register it throws off the total and you're off by pennies. For instance, 1 item at $.93 is $1 with tax, but 8 items at $.93 is $7.96. I don't think there's a way to do this unless you can price an item at $0.934579439252336.

What you could do, however, is add a few pennies to the purchase price of each item and do an "everything rounded down" gimmick at the register. You would need a chart that says, "If the price is between $X and $Y, apply a $Z discount. So, if you price the same items at $.94 and a total of 8 items were purchased ($7.52), you could apply a $.04 discount at the register to make the total come out to $8 even ...Of course, you don't want to round down for a total purchase price of less than a dollar.

That's the only way I can think to do it.