Answer:
$1500 per month
Explanation:
The scenario contains a lot of differential costs between the current and expansion scenarios however the question only talks about one cost - utility per month.
The differential cost of utilities from choosing to expand the facilities is:
The difference between what utility is in the current facility which is 1,500 / month, and the fact that Management estimates they will need to increase utility to $ 3,000 / month
Therefore the difference is $1500 per month