Nami is preparing for an income fund for her retirement. She wants to receive 15,000 pesos quarterly for the next 25 years starting 1 month from now. The income fund pays 10.5% compounded monthly. How...

Nami is preparing for an income fund for her retirement. She wants to receive 15,000 pesos quarterly for the next 25 years starting 1 month from now. The income fund pays 10.5% compounded monthly. How much Aylene deposit now to pay for the annuity? (Kindly explained why you use the formula and please use formulas from google so I can understand it. This is already my 5th time asking this question)