Answer:
see attached
total: 300 logs
Explanation:
When calculations are repetitive, it is convenient to let a spreadsheet do them.
Here, the number of logs per tree is found by dividing the tree height by 8 feet. The number of logs from trees that height will be found by multiplying the number of trees by the number of logs that height will give.
The total number of logs is the sum of the numbers from all the tree heights.
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The total number of logs is 300. (The rightmost column of the attached spreadsheet matches the rightmost column of your table.)