Price Change
1. The problem states that the price of softwood increased 6% annually for the last 5 years and before that, it had decreased by 2% annually.
2. Let's denote the price at the initial time (before the 5 years of increase) as $P_0$.
3. The price after the period of decrease is $P_1 = P_0 \times (1 - 0.02)^t$ where $t$ is the number of years of decrease before the increase period.
4. Then, the price increased for 5 years at 6% per annum, so the price after 5 years is given by:
$$P = P_1 \times (1 + 0.06)^5$$
5. Substituting $P_1$ into the expression:
$$P = P_0 \times (1 - 0.02)^t \times (1 + 0.06)^5$$
6. Without the exact number of years $t$ for the decrease period, we cannot find a numeric final price but this formula expresses the relationship.
7. If $t$ is given, substitute to find the multiplier effect on the initial price.
In summary, the price after these changes is
$$P = P_0 \times (0.98)^t \times (1.06)^5$$