Want to get rid of all those pesky coins?
You can choose a rounding strategy in your Orders Settings.
Rounding offers two strategies:
Always round down (so $10.99 becomes $10)
Round to the nearest dollar (so $10.50+ becomes $11; $10.49 or less becomes $10)
NOTE: This currently only works for orders where payment type is "Cash" or "Debit" exactly.
You'll see a line item on the receipt to account for the rounding. Changing the amount you charge a customer automatically adjusts the taxes up/down to reflect the difference of the adjustment.