Breanna works in the mall and her hours increase during busy shopping times of the year. Breanna has a plan to save $25 each week for 5 weeks, and then increase that amount by $20 for the next 7 weeks during the busy time, then go back to $25 per week. If Breanna’s plan is to save $540, how many weeks total will she need to save?

Breanna saves $25 per week for the first 5 weeks, which is $125. During the next 7 weeks, she saves $25 + $20 = $45 per week, or $315, bringing her total to $440. She still needs $100, which takes 4 more weeks at $25 per week. Altogether, she needs 5 + 7 + 4 = 16 weeks, so the answer is 16 weeks.

AI-written and checked against the verified answer.