To find the depreciation of the piece of machinery in the sixth year, we first need to analyze the depreciation amounts for the first three years:
- Year 1: $8,000
- Year 2: $7,500
- Year 3: $7,000
Next, we can see that the depreciation decreases each year by $500 (from $8,000 to $7,500 is a decrease of $500, and from $7,500 to $7,000 is also a decrease of $500).
If this pattern continues, we can determine the depreciation for the following years:
- Year 4: $7,000 - $500 = $6,500
- Year 5: $6,500 - $500 = $6,000
- Year 6: $6,000 - $500 = $5,500
Therefore, the amount of depreciation of the piece of machinery in the sixth year is $5,500.