Sandlot Inc. sold baseballs costing $300 for $750 on account. After two weeks the customer returned the baseballs. The baseballs are not defective and Sandlot Inc. expects to be able to resell them at the same price.  How much Cost of Goods Sold REMAINS on the books from the original sale AFTER the sales return is recorded? Record the dollar amount of your answer (do not write the dollar sign).