Marigold Corporation produces wooden and aluminum baseball bats. In preparing the current budget, Marigold's management estimated a total of $468,000 in manufacturing overhead costs and 18,000 machine hours for the coming year. In December, Marigold's accountants reported actual manufacturing overhead incurred of $45,000 and 17,750 machine hours used during the year. Marigold applies overhead based on machine hours. (a) What was Marigold's predetermined overhead rate for the year? Predetermined overhead rate $ / machine hour