Answer: The jewelry is going to be $1291.08 after 4 years.
Step-by-step explanation: U will need to divide the 12.1% by 100 and that will give you 0.121 and then u would have to times the 0.121 by 4 and then add 1 and then u will have to times 870 by 4.484 which will give u $1291.08. Or u could just use this equation: 870(1+(0.121 x 4).