For each problem below, write out the formula to calculate the answer and then write the answer below it. Example: You put $100 into an investment fund every year and then add another $200 at the end of year 3. If the fund provides a rate of return of 5%, how much money will be available for you to withdraw in year 5? Answer: $100(F/A, 5%, 5) + $200(F/P, 5%, 2) 2) A large retailer plans to run an experiment at one of its stores to see how cost effective it will be to imbed merchandise with small radio frequency identification (RFID) chips. Shoppers will select items from the store and walk out without stopping to pay at a checkout lane. The RFID chips will record what items are taken and will automatically deduct their price from shoppers' bank accounts. The retailer expects to save the cost of staffing 12 checkout lanes, which amounts to $100,000 per year. How much can the retailer afford to spend on its RFID investment if the system has a life of 10 years and no residual value? The retailer's interest rate is 15% per year