Final answer:
Julie cannot claim a child and dependent care credit because her AGI is outside the qualifying income range.
Step-by-step explanation:
Julie can claim a child and dependent care credit based on the amount she paid to the day care center and her AGI. The amount of the credit is calculated based on a percentage of her qualifying expenses. For AGIs below $15,000, the credit percentage is 35%. For AGIs between $15,000 and $43,000, the credit percentage gradually decreases from 35% to 20%. Since Julie's AGI is $50,000, she falls outside of the income range to qualify for the credit.