Answer is B.
The x-values of this function are all real numbers greater than or equal to zero.
<u>The total </u><u>labor cost</u><u> of the carpenters is $2296.91</u>
The carpenters worked 
<h3>Conversion of Fraction</h3>
Let's convert the mixed fraction to improper fraction
So, we would have
- 63/4,
- 61/4,
- 35/2,
- 25/2
- 35/2.
<h3>Working Cost</h3>
Let's sum it up and multiply by the working cost per hour

- The total labor cost is = total hours worked * hourly rate.
This becomes 
<u>The total labor cost is $2296.91</u>
Learn more about rate here;
brainly.com/question/1115815
It is 0 because anything multiplied by 0 is 0.