E7.22 Predetermined plantwide overhead rate: printing firm The following annual data relate to Facsimile Printing Pty Ltd: LO7.3 15 000 30 000 Budgeted machine hours Budgeted direct labour hours Budgeted direct labour cost Budgeted manufacturing overhead $420 000 $546 000 During the month of June the firm worked on three products-business cards, wedding invitations and promotion flyers-using the following inputs: Business cards Wedding invitations Promotion flyers 600 300 200 Actual machine hours Actual direct labour hours 800 600 400 Actual manufacturing overhead costs for June were $51 000 and the actual direct labour rate was $22.50 per hour. Required: Assume that the firm uses machine hours as its overhead cost driver: 1. Calculate the firm's predetermined plantwide overhead rate. 2. Estimate the overhead costs of each of the three products. 3. Compare the actual overhead cost to the amount of overhead applied to the three products in June