Isaiah reads articles about the insufficient savings of those in retirement and decides he needs to start saving now, even thoughhe's in his 50s. He saves $500 per month for 15 years and earns 7% by investing in the stock market through an index fund.The value of his retirement account after 15 years will be $How much of the toal did Isaiah contribute himself? $How much mondy did Isaiah make through compounded returns in this investment account? $