Find the cost price of the digital watch for the shopkeeper if he initially marked it at 80% above the cost price and later offered two successive discounts of 15% and 20%. After these discounts, 'X' spent Rs. 164 on repairing the digital watch and then sold it to 'Y' for Rs. 2460, resulting in a 20% profit for Shopkeeper. Determine the original cost price for the shopkeeper.