i think the answer would be $119.60.
you start by doing 115*.02=2.3. this means that every year, juan will have to pay an extra $2.3. you then multiply 2.3 by 2, since it’s taking 2 years, getting 4.6. if you do 115+4.6, you get your total of $119.60. im pretty sure that should be correct. :-)