Methods to prepare accounts - class-IX

A company sends its cars to dealers on sale or return basis. All such transactions are, however, treated like actual sales and are passed through the sales day book. Just before the end of the financial year, two cars which had cost Rs 50,000 each have been sent on 'sale or return' and have been debited to customers at Rs 80,000 each. Cost of goods lying with the customers will be _______________.