45. How much should you deposit into an account today (at t = 0) to accumulate $100,000 ten years from now on December 31, Year 10) for your retirement, assuming that you can earn 6% per year, compounded annually, on this deposit? 46. Use the Rule of 72 to calculate the approximate number of years that it will take an investment to double, assuming that 10% can be earned annually on the investment. 47. 48. Great Grocery Store, a local retail grocery store, is considering a $200,000 expenditure for new freezers in its Frozen Food Department. These freezers are expected to have a $20,000 salvage value at the end of their eight-year life. a. Based on the above information, calculate the annual Depreciation Expense for the new freezers. Assume that the straight-line depreciation method is used. b. If Great Grocery Store is in the 28% tax bracket, calculate the annual tax savings that the firm will realize due to the tax-deductibility of the non-cash Depreciation Expense on these new freezers