Prepare an incremental analysis for the four years that shows whether Sheffield should retain the existing machine or buy the new

one. $($Ignore income tax effects.$)($If an amount reduces the net income then enter with a negative sign preceding the number or parenthesis,

e$.$g$.-15,000,(15,000).$ Enter all other amounts as positive and subtract where necessary. Do not leave any answer field blank. Enter $0$ for

amounts.$)$