Please write the calculation procedure

Toby Mcguire just won a lottery, and he is considering purchasing an investment that promises to give him $350 at the end of each month for 24 months, then $420 at the end of each month for 36 months, and then $425 at the end of each month for 36 months. If the first payment is due at the end of the first month and interest is 8.0% compounded annually over the term of the annuity, how much should Toby pay for this investment now