Answer: Option (c) is correct.
Step-by-step explanation:
Correct option : $30000
Given that,
Earned as an accountant = $30000
Rent from real estate = $12,000
Video rental store showed total revenue = $60,000
Total costs = $30,000
Opportunity cost of previous job = $30000
Net revenue = Total revenue - Earned as an accountant
= 60000 - 30000
= $30,000
Therefore, our previous salary is same as this net revenue.
So, the only cost of operating the video store is $30000.