Items are sold by a retailer for a price of $30 each, which represents a 20 percent markup over the cost paid by the retailer for each item. Of 50 items ordered, 30 are sold, and 10 are returned to the manufacturer for a refund of 40 percent of the dealer's initial cost. If the remaining inventory is sold, what is the retailer's approximate profit or loss as a percent of the retailer's initial cost for the 50 items?