Based on the results of the analysis, what conclusion can you make on the appropriateness of the useful lives and estimated

salvage values of the assets sold?

Since $17$ of $62$ assets had a gain or loss greater than $15\%$ of net book value, the useful lives and estimated salvage

values should be reviewed.

Since $45$ of $62$ assets had a gain or loss within $15\%$ of the net book value, the useful lives and estimated salvage values

are appropriate and do not need to be reviewed.

Only assets where the gain is greater than $15\%$ should have the useful lives and estimated salvage values reviewed.

Only assets where the loss is greater than $15\%$ should have the useful lives and estimated salvage values reviewed.