Reading Comprehension (幾深)

America's 78 million credit cardholders carried an average balance of $7,564 last year. The cost in interest and fees amounted to more than $1,000 for the typical budget.
1) 這句意思是? 以及不太明白其句子結構
If you just said, "Budget - what budget?," you know what I mean. Truth is, most of us go on spending sprees from time to time.2) From Time to time 意思~?But, when power shopping creates the illusion of success, even as debts spiral out of control, it has become a weakness.3)power Shopping 點解~?4) become a weakness 不太明白?
Some obvious signs that spending is out of control include making minimum payments on your credit cards, late fees, bounced checks, lack of a budget and loss of sleep over money worries.