Answer:
a)Terry made $4021 more this year .
b) If Terry gets the same raise again next year, her total income will be $27478.
Explanation:
Terry initial income = $19436
Terry's new income = $23457
Increase in income = New income - initial income 
 =$23457-$19436
 =$4021
a)So, Terry made $4021 more this year 
Now we are given that If Terry gets the same raise again next year, what will her total income be then.
His income this year = $23457
Increase in income = $4021
So, Income in next year =$23457+ $4021=$27478
b) If Terry gets the same raise again next year, her total income will be $27478