Lonely Guy Repair Service recently performed repair services for a customer that totaled $400.Somehow the bill was lost and the company accountant was trying to recreate the bill from memory.This is what was remembered: $$\begin{array} { l l }
\text { Total bill } & \$ 600 \
\text { Labor profit margin } & \$ 10 \
\text { Materials profit margin } & 20 \% \
\text { Total labor charges } & \$ 390 \
\text { Cost of materials used } & \$ 120 \
\text { Total hourly cost } & \$ 22.50
\end{array}$$
-How many hours were billed on the job?

Question

Lonely Guy Repair Service recently performed repair services for a customer that totaled $400.Somehow the bill was lost and the company accountant was trying to recreate the bill from memory.This is what was remembered: $$\begin{array} { l l } 
\text { Total bill } & \$ 600 \
\text { Labor profit margin } & \$ 10 \
\text { Materials profit margin } & 20 \% \
\text { Total labor charges } & \$ 390 \
\text { Cost of materials used } & \$ 120 \
\text { Total hourly cost } & \$ 22.50
\end{array}$$ 
-How many hours were billed on the job?

Quizplus · Accepted Answer

The Answer of Lonely Guy Repair Service recently performed repair services for a customer that totaled $400.Somehow the bill was lost and the company accountant was trying to recreate the bill from memory.This is what was remembered: $$\begin{array} { l l } 
\text { Total bill } & \$ 600 \
\text { Labor profit margin } & \$ 10 \
\text { Materials profit margin } & 20 \% \
\text { Total labor charges } & \$ 390 \
\text { Cost of materials used } & \$ 120 \
\text { Total hourly cost } & \$ 22.50
\end{array}$$ 
-How many hours were billed on the job?

Lonely Guy Repair Service Recently Performed Repair Services for a Customer