A computer company charges itself a depreciation expense for a piece of equipment at the beginning of each year for 25 years. It accumulates these charges at an annual effective interest rate of 4% to account for inflation. The first charge is $5,000, and each following depreciation charge will increase by $150 per year through the 15th year. The depreciation expense then decreases by $100 per year for the remaining years. What is the accumulated value of the charges at the end of the 25th year?