The accountant for a small manufacturing firm computes the annual depreciation of each piece of tooling, equipment, and machinery in the company. From a detailed itemized list, the accountant groups all items together that have the same life expectancy $($number of years of usefulness$)$ as shown in Figure $1-22.$ Find the annual depreciation for each group and the total annual depreciation of all tooling, equipment, and machinery, using the straight$-$line formula.

Annual depreciation Cost $-$ Final value