The seller of a certain piece of real estate received the following two offers from prospective purchasers: Offer 1: The payment for the first year is $24,000, and the payment for nine years thereafter there is an annual increase of $1800 in the payments. Offer 2: The payment for the first six months is $12,000, and for the second six months is $12,450. For nine years thereafter there is a semiannual increase of $450 in the payments.
Which offer will give the seller more money over a ten year period and how much more?