An amount, P, must be invested now to allow withdrawals of $900 per year for the next 13 years and to permit $320 to be withdrawn starting at the end of year 6 and continuing over the remainder of the 13-year period as the $320 increases by 6% per year thereafter. That is, the withdrawal at EOY seven will be $339, $359.34 at EOY eight, and so forth for the remaining years. The interest rate is 10% per year. What is the P amount?