CPI Tracks Consumer Goods and Services Prices

Steps:

• Recall that CPI measures inflation by tracking price changes for typical consumer purchases.
• Identify the core component: a fixed "market basket" of goods and services bought by households.
• Evaluate options against this: A matches the basket, while B-D relate to other economic indicators.
• Confirm A as the direct input for CPI calculation.

Why A is correct:

• CPI is defined as the average price level of a fixed basket of goods and services purchased by urban consumers, weighted by consumption patterns (Bureau of Labor Statistics formula: CPI = (Cost of basket in current period / Cost in base period) × 100).

Why the others are wrong:

• B: Exports and imports factor into trade balances or GDP deflators, not CPI.
• C: Currency values affect exchange rates, unrelated to domestic consumer prices in CPI.
• D: Wages influence purchasing power but are not priced in the CPI basket.

Final answer: A