14) Mary has two children whose names are Danny and Darren. Danny will enter the college in next year. The tuition fee for Danny is THB70,000 per semester which will be paid at the beginning of each semester for five years. Darren will enter the college in the next three years. The tuition fee for Darren is THB85,000 per semester which will be paid at the beginning of each semester for four years. If the interest rate is 6.5% annually, how much Mary has to deposit today in order to pay all her children's tuition fee in the future