Answer the Following Questions Using the Information Below:
Botany Bay

Answer the following questions using the information below:
Botany Bay Boatbuilders uses departmental cost driver rates to allocate manufacturing overhead costs to products.Manufacturing overhead costs are allocated on the basis of machine-hours in the Machining Department and on the basis of direct labour-hours in the Assembly Department.At the beginning of 2010,the following estimates were provided for the coming year:
$$\begin{array}{l}\begin{array} { l l l } & \text { Machining } & \text { Assembly } \\\text { Direct labour-hours } & 30000&60000 \\\text { Machine-hours } & 80000&20000 & \\\text { Direct labour cost } & \$ 500000 & \$ 900000 \\\text { Manufacturing overhead costs } & \$ 420000 & \$ 240000\end{array}\\\\\text { The accounting records of the company show the following data for Job \#316: }\end{array}$$

$\begin{array}{lcc}& \text { Machining } & \text { Assembly } \\ \text { Direct labour-hours } & 120 & 70 \\\text { Machine-hours } & 60 & 5\\\text { Direct material cost } & \$ 300 & \$ 200 \\\text { Direct labour cost } & \$ 100 & \$ 400 \end{array}$
-For Botany Bay Boatbuilders,what is the annual manufacturing overhead cost-allocation rate for the Machining Department?

A) $4.00
B) $4.67
C) $4.20
D) $5.25