The U. S. has a treaty with Mexico to not deal in historical artifacts in order to preserve the artifacts in the country they came from. An archaeologist in Mexico who has previously been selling artifacts to American buyers:

An archaeologist in Mexico who sells artifacts to the American buyers previously will not sell the artifacts.

In this case, there's a treaty with Mexico by the United States to not deal in historical artifacts, therefore the archeologist won't sell the artifacts to the buyer from America.

There's no right to sell the artifacts and the archaeologist won't want to break the law because this may lead to a negative consequence.

Therefore, the best thing to do is not to sell the artifacts.

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month 1 start amount =$3287.90 interest=(3287.90x0.0145/12)3.97 total to pay=$3291.81 paid =$1200 balance =$2,091.87

month 2 starting amount= $2,091.87 interest =$25.28 total to pay =$2117.15 paid =$1200 balance $917.15

month 3 starting amount =$917.15 interest =$11.08 total to pay =$928.23 paid =$928.23 balance =$0 total to pay 1200+1200+928.23 = $3328.23 it will take 3 months to pay a total of $3328.23