Answer: The correct answer is " a. $92,000.".
Explanation: The explicit costs are observable, that is, those that we can easily take into account and decrease our operating result (salaries paid to employees, material costs, taxes, etc.)
So her total explicit cost were: $12 000 + $65 000 + $15 000 = $92 000.
The unemployment rate will be of 10% of the economy. We can only have in mind the Million people who are actively seeking work in here which is in itself what is taken into account when talking about economy's unemployment rate. Remember also that the unemployment rate that is consistent with full employment known as the natural rate of unemployment.