Rather Bedding Makes Two Types of Pillow-Down and Foam Which Two Cost Pools Could Be Combined Without Affecting the Is

Rather Bedding makes two types of pillow-down and foam. It is currently implementing an activity-based costing system. In the past, all overhead had been applied on the basis of machine hours. The company produces 6,000 down pillows and 18,000 foam pillows per year.
$\begin{array}{|l|c|c|c|c|}\hline\text { Cost Pool } & \begin{array}{c}\text { Driver and } \\\text { Level }\end{array} & \begin{array}{c}\text { Estimated } \\\text { Costs }\end{array} & \begin{array}{c}\text { Use of Driver by } \\\text { Down Pillows }\end{array} & \begin{array}{c}\text { Use of Driver by } \\\text { Foam Pillows }\end{array} \\\hline \text { Equiument setup } & 360 \text { setups } & \$ 216,000 & 120 \text { setups } & 240 \text { setups } \\\hline \text { Materials ordering } & 6,000 \text { orders } & \$ 60,000 & 2,400 \text { orders } & 3,600 \text { orders } \\\hline \text { Quality control }&2,000\text { inspections }&\$ 36,000 & 800 \text { inspections } & 1,200 \text { inspections }\\\hline \text { Machining }&\text { 8,000 machine hours }&\$86,000&\text { 4,200 machine hours }&\text { 3,800 machine hours }\\\hline\end{array}$
Which two cost pools could be combined without affecting the unit costs using ABC?

A) Equipment setup and machining
B) Materials ordering and quality control
C) Materials ordering and machining
D) None. The drivers for each activity differ.