Find the final amount in the following retirement account, in which the rate of return on the account and the reputar contribution charge over time $260 per month invested at 4%, compounded monthly, for 4 years; then $477 per month invested at 6%.compounded monthly, for 4 years What is the amount in the account after 8 years? $(Do not round until the final answer. Then round to the nearest dollar as needed.)