Answer:
$9.20
Explanation;
From the question we are told that Mr. Nee had a loss of $27.60 over the last 3 months, this can be expressed as;
$27.60 = 3months
To calculate the average loss per month, we will say;
x = 1 month
Divide both expressions
27.60/x = 3/1
Cross multiply
27.60 * 1 = 3x
27.60 = 3x
3x = 27.60
x = 27.60/3
x = 9.20
Hence the average loss per month is $9.20