At the beginning of the year, manufacturing overhead for the year was estimated to be $274,770. At the end of the year, actual direct labor-hours for the year were 21,900 hours, the actual manufacturing overhead for the year was $272,100, and manufacturing overhead for the year was overapplied by $10,410. If the predetermined overhead rate is based on direct labor-hours, then the estimated direct labor-hours at the beginning of the year used in the predetermined overhead rate must have been: (Round your intermediate calculations to 2 decimal places.)