Answer:
$69,000
Step-by-step explanation:
The computation of the operating income would be shown below:
= Buying cost - making cost
where,
Buying cost equals to
= 60,000 × $3
= $180,000
And, the making cost would be
= Variable cost + fixed cost × avoid percentage
= $90,000 + $70,000 × 30%
= $90,000 + $21,000
= $111,000
Now put these values to the above formula
So, the value would equal to
= $180,000 - $111,000
= $69,000