Answer:
$1,200 
Step-by-step explanation:
Data provided in the question: 
Nora Hayes is a widow
Nora's earned income and adjusted gross income = $44,000
Work-related expenses paid = $6,000
Now,
Since,
Nora have two dependent preschool children 
Thus,
Total $6,000 paid for child care qualifies for the credit. 
Therefore,
Tax credit for Nora = 20% of child care expenses
= 20% × $6,000 
= $1,200