Entering the spinoff transaction for TRP/SOBO using the built-in transaction gives me the correct number of shares but the ACB's for both are incorrect. SOBO takes the closing price of the day, TRP adds the (number of shares x closing price) to the existing cost, giving me an ACB almost twice what it should be. The advice from the company website is that 91% of the original ACB should be allocated to TRP and 9% to SOBO, adding up to 100%. How can I adjust the total cost of TRP by -9%?