Suppose you will receive $17,000 in 7 months and another $10,000 in 23 months. If the discount rate is 6% per annum (compounding monthly) for the first 10 months, and 13% per annum (compounding monthly) for the next 13 months, what single amount received today would be equal to the two proposed payments? (answer to the nearest whole dollar don't include the $ sign or commas)