Answer:

Explanation:
For this exercise it is important to analize the information provided in the exercise.
According to the exercise, the of cost each computer is:

You know that the school district purchased 615 new laptops for their mobile labs; therefore, in order to calculate the total cost for all the laptops purchased, you must multiply the cost of one laptop ($409) by 615.
Therefore, you get that the total cost is the following:
