Sky High Company has two departments, X and Y. The following estimates are for the coming year X Y Direct manufacturing labor-hours Machine-hours Manufacturing overhead 50,000 70,000 $350,000 70,000 50,000 $490,000 The budgeted indirect-cost driver rate for Y based on the number of machine-hours is in excess of X by (Round interim and the final answer to the nearest cent) OA. $2.80 per machine-hour OB. $9.80 per machine-hour OC. $11.80 per machine-hour OD. $4.80 per machine-hour