Use the Following Information for Questions
Lonely Guy Repair

question 90

Multiple Choice

Use the following information for questions
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: $$\begin{array} { l l } \text { Total bill } & \$ 600 \\\text { Labor profit margin } & \$ 10 \\\text { Materials profit margin } & 20 \% \\\text { Total labor charges } & \$ 390 \\\text { Cost of materials used } & \$ 120 \\\text { Total hourly cost } & \$ 22.50\end{array}$$
-What was the material loading charge?

• A) 37.5%
• B) 43.8%
• C) 61.3%
• D) 75%

---

Definitions:

IR Absorption

The process by which molecules absorb infrared radiation, used in spectroscopy to identify chemical compounds.

Ethyne

A hydrocarbon compound with the formula C2H2, known as acetylene, used as a fuel and a building block in organic synthesis.

Dipole Moment

A measure of the polarity of a chemical bond within a molecule, quantifying the separation of positive and negative charges in a molecule.

IR Spectrum

A graphical display of infrared light absorption by molecules, useful for identifying functional groups and chemical bonds.