Answer:
The company should close its business for the month.
Step-by-step explanation:
When the company remains opens then it has contribution margin of $15000 and its fixed cost is $60000. Therefore, the loss that occurred to the company when it remains open is, $60000 - $15000 = $45000 (loss).
However, if the company closed then only 30 % of the fixed cost will be the loss of the company. Therefore, the loss occurred to the company when it closes down:

Since the loss to the company is lower when it remains close. Thus, the company should be closed for the month.