$9$ A machine costing $$30,000$ will be depreciated to a book value of zero using straight$-$line

depreciation over the life of a $4-$year project. The tax rate is $40\%.$ What is the book value of the

machine at the end of Year $3?$

$($a$)$ $$15,000$

$($b$)$ $$0$

$($c$)$ $$18,750$

$($d$)$ $$7,500$

$10$ Project Omega is a $3-$year project which requires an initial outlay of $$8,000,$ which will be

depreciated over the life of the project to a book value of zero using straight$-$line depreciation. It

will generate incremental revenue of $$8,000$ per year and incur incremental costs $($excluding

depreciation$)$ of $$4,560.$ The tax rate is $25\%.$ What is the annual incremental earnings after tax

from this project?

$($a$)$ $$558$

$($b$)$ $$171$

$($c$)$ $$580$

$($d$)$ $$751$