Choose the best answer to the following question. explain your reasoning. suppose you deposited $30 per month into a savings plan for 7 years and at the end of that period your balance was $19,600. what was the amount you earned irn interest? years and at the end of that perlod your balance was $19,600 choose the correct answer below. oa. o b. o c. o d. o e. ( f. it is impossible to compute without knowing the apr. to find the correct answer, divide the number of payments by the apr. it is impossible to compute without knowing the apr. to find the correct answer, multiply each $30 deposit by the apr, and then multiply the product by the number of months in 7 years. it was $17,080. divide the balance of $19,600 by the number of years, 7. it was $34,160. calculate the amount deposited over 7 years and then add it to the balance of $19,600. it was $17,080. calculate the amount deposited over 7 years and then subtract it from the balance of $19,600. it was $34,160. multiply the balance of $19,600 by the number of years, 7.