Finite Math

Five years ago, Diane secured a bank loan of $370,000 to help finance the purchase of a loft in the San Francisco Bay area. The term of the mortgage was 30 years, and the interest rate was 10% per year compounded monthly on the unpaid balance. Because the interest rate for a conventional 30-year home mortgage has now dropped to 6% per year compounded monthly, Diane is thinking of refinancing her property. (Round your answers to the nearest cent.)
(a) What is Diane's current monthly mortgage payment?
$

(b) What is Diane's current outstanding balance?
$

(c) If Diane decides to refinance her property by securing a 30-year home mortgage loan in the amount of the current outstanding principal at the prevailing interest rate of 6% per year compounded monthly, what will be her monthly mortgage payment? Use the rounded outstanding balance.
$

(d) How much less would Diane's monthly mortgage payment be if she refinances? Use the rounded values from parts (a)-(c).
$

I only have one submission left please help!!! I can't figure it out!

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  1. P = Po*r*t/(1-(1+r)^-t).
    r = 0.1/12 = 0.00833/mo.
    t = 30 * 12 = 360 mo.

    P = 370,000*0.00833*360/(1-1.00833^(-360)) = $1,168,458.50.
    a. Monthly Payment(MP) = P/t = $3245.72.

    b. Bal. = P - 60*MP = $973,715.30.

    c. MP = Bal./t = $2704.76.

    d. 3245.72 - 2704.76 =

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