OPG Company Manufactures Display Cases to Be Sold to Retail

Essay

OPG Company manufactures display cases to be sold to retail stores. The cases come in three sizes: Large, Medium, and Small. Currently, OPG Company uses a single plant-wide overhead rate to allocate its $3,357,800 of annual manufacturing overhead. Of this amount, $820,000 is associated with the Large Case line, $1,276,800 is associated with the Medium Case line, and $1,261,000 is associated with the Small Case line. OPG Company is currently running a total of 33,000 machine hours: 10,000 in the Large Case line, 13,300 in the Medium Case line, and 9,700 in the Small Case line. OPG Company uses machine hours as the cost driver for manufacturing overhead costs.
Required:
a. Calculate the plant-wide manufacturing overhead rate.
b. Calculate the departmental overhead rate for each of the three departments listed.
c. Which product line(s)have been overcosted by using the plant-wide manufacturing overhead rate? By how much per machine hour? Which product line(s)have been undercosted by using the plant-wide manufacturing overhead rate? By how much per machine hour?