I need the answer to this question:

On December 1, Kate Holmes opened a speech and hearing clinic. During December, her firm had the following transactions involving revenue and expenses.

Paid $2,150 for advertising

provided services for $1,850 in cash

Paid $610 for telephone service

Paid salaries of $1,650 to employees

Provided services for $2,050 on credit

Paid $260 for office cleaning service

Did the firm earn a net income or incur a net loss for the period? What was the amount?