Final answer:
The prices of a shirt and a pair of pants in year 2 are $26 and $21, respectively, and the calculated CPI for year 2 is 104.35.
Step-by-step explanation:
The student is tasked with calculating the Consumer Price Index (CPI) of a simple economy with two items: shirts and pants, after their prices have increased by $1 in year 2.
Compute the total cost of the basket for year 1: (3 shirts × $25) + (2 pants × $20)
= $75 + $40 = $115.
For year 2, the prices increase by $1 for each item, hence: (3 shirts × ($25 + $1)) + (2 pants × ($20 + $1))
= (3 × $26) + (2 × $21)
= $78 + $42
= $120.
The CPI for year 1 (base year) is always 100, and the CPI for year 2 can be calculated as: CPI Year 2 = (Cost of basket in Year 2 / Cost of basket in Year 1) × 100
= ($120 / $115) × 100
= 104.35 (rounded to two decimal places).
The prices of a shirt and a pair of pants in year 2 are $26 and $21, respectively, and the CPI for year 2 is 104.35.