Ahhh, so that's how it works...
So there I was, ignorantly accepting my change from a supermarket without ever questioning if I had received the right change. And then it hit me, Peru doesn’t have any freaking pennies. There doesn’t exist a 1 cent coin. So naturally I wondered where that money was going. I finally asked a cashier today what the deal was. To which she explained that if the price is 4 cents or lower, they round down and 5 or more rounds up. Very clever Peru.
On a side note I had ceviche today and combined with my day off, today has been the best day all week.