Answer:
Before the tax law change, the couple paid a total of:
$83,000 x 20% = $16,600 in taxes
After the tax law change, now the couple must pay a total of:
$83,000 x 28% = $23,240 in taxes.
For this reason, Mrs. Esposito must make, in her part time job, a total of:
$23,240 - $16,600 = $6,640 dollars in order to maintain the couple's after-tax disposable income.