Use the Following Information for Questions
Lonely Guy Repair

question 121

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: $$\begin{array} { l l } \text { Total bill } & \$ 600 \\\text { Labor profit margin } & \$ 10 \\\text { Materials profit margin } & 20 \% \\\text { Total labor charges } & \$ 390 \\\text { Cost of materials used } & \$ 120 \\\text { Total hourly cost } & \$ 22.50\end{array}$$
-How many hours were billed on the job?

• A) 19.5
• B) 18.5
• C) 17.3
• D) 12.0

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Definitions:

Microsoft Access

Microsoft's database management system intertwines the relational Microsoft Jet Database Engine, a graphical user interface, and tools for software development.

QBE

Query By Example, a feature of database management systems that allows users to search by filling out a form or a "template" with example elements.

Binary Relationship

A binary relationship in databases and data modeling is a type of association that exists between two entities, indicating how records in one entity relate to records in another.

Entities

Any definable units, such as individuals, organizations, or objects, that exist independently with distinct characteristics.