I deposit the money of a lease contract of a warehouse for one year, which starts today, with a canon of $ 3,000,000 per month in advance, in a corporation that offers 2.5% per month. A) Find the accumulated amount obtained, six months after the expiration of the contract. B) If the lessee wanted to pay the total amount of the contract today, and the 2.5% per month for early payment, how much should he pay today? Please make it step by step and understandable, if you can do the process in excel it would be phenomenal. The topic we are working on is annuities.