The following question requires your selection of CCC/CCE Scenario 4 (2.

To calculate the increase in copper prices over 30 months (which is 2.5 years), we apply the inflation rates for the first two years and half of the third year:

Year 1: 1.0%

Year 2: 1.5%

Year 3 (half-year): 1.5% / 2 = 0.75%

The total percentage increase is calculated as:

Total Increase=(1+0.01)×(1+0.015)×(1+0.0075)−1\text{Total Increase} = (1 + 0.01) \times (1 + 0.015) \times (1 + 0.0075) - 1Total Increase=(1+0.01)×(1+0.015)×(1+0.0075)−1 \text{Total Increase} = 1.01 \times 1.015 \times 1.0075 - 1 \approx 1.066 - 1 = 0.066 \text{ or 6.6%}

So, the correct answer isC. 6.6%.