Ridgewood, Co. estimated the following annual hours and costs: Expected annual direct labor hours 32,000 Expected annual direct labor cost $1,088,000 Expected machine hours 32,000 Expected material cost for the year $1,305,600 Expected manufacturing overhead $1,632,000 (a) Calculate predetermined overhead allocation rates using each of the four possible allocation bases provided. (Round direct labor cost and direct material cost answers to 2 decimal places, e.g. 15.25 and all other answers to O decimal places, e.g. 5,275.)