Just read my payment receipt from the "99c only" store, here in Reno.
I bought one item, marked on the shelf as being for sale at, wait for it.... 99 cents.
However my receipt shows the price to be 0.9999. That is four decimal places and guess what the real subtotal price is?
$1.00
So be careful in these "discount" places. At least the other store, whose name is "The Dollar Store", is honest in their pricing.
We won't get into a debate on the actual value of the merchandise... I needed it and they had it.