This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Using multiplication and addition in a multistep cost problem
Prompt focus: Review the prompt, identify the command word, and connect the facts to the tested objective.
Why the correct answer works
109
Multiply each price by its quantity and add: 3(23) + 2(20) = 109.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
Review this skill: Using multiplication and addition in a multistep cost problem. Use the stem's deciding facts, then verify the choice against the units, timing, evidence, or safety condition stated in the question.
Simple analogy
Think of using multiplication and addition in a multistep cost problem like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.