To buy a computer that is worth $ 6,000,000, you must pay an initial installment of 40% and the rest is paid in 36 monthly installments, how much will the installment be, if the interest is 3.5% effective monthly?

Now, how many biweekly payments of $ 391,250 must you make to pay off debt of $ 8,500,000, with the 24% convertible every 15 days?

Solve with excel and show formulae