Use the Information Below to Answer the Following Question(s)

Use the information below to answer the following question(s) .
Julia's Catering has a monthly target operating income of $6,000. Variable expenses are 40% of sales and monthly fixed expenses are $3,600.
-What is the monthly margin of safety in dollars if Julia's Catering achieves its operating income goal?

A) $10,000
B) $22,000
C) $16,000
D) $4,000