Answer: Therefore, the total bill, represented by b, is $132.50.
Step-by-step explanation: Let's solve the problem using the given information and the variable b.
According to the problem, 3/5 of the total bill represents the labor costs, which amounts to $79.50.
We can set up the equation:
(3/5) * b = $79.50
To solve for b, we need to isolate it on one side of the equation. We can do this by multiplying both sides of the equation by (5/3) to cancel out the fraction:
b = ($79.50) * (5/3)
b = $132.50