Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

What should I do with $4,000 cash and High Interest Debt?
This is the kind of scenario addressed by Reddit's /r/personalfinance Prime Directive, or "I have $X, what should I do with it?" It follows a fairly linear flowchart for personal spending beginning with a budget and essential costs. The gist of the flowchart is to cover your most immediate costs and risks first, while also maximizing your benefits. It sounds like you would fall somewhere around steps 1 and 3. (Step 2 won't apply since this is not pretax income.) If you don't already have at least $1000 reserved in an emergency fund, that's a great place to start. After that, you'll want to use the rest to pay down your debt. Your credit card debt is very high interest and should be treated as a financial emergency. Besides the balance of your gift, you may want to throw whatever other funds you have saved beyond one month's expenses at this problem. As far as which card, since you have multiple debts you're faced with the classic choice of which payoff method to use: snowball (lowest balance first) or avalanche (highest interest rate first). Avalanche is more financially optimal but less immediately gratifying. Personally, since your 26% APR debt is so large and so high interest, I would recommend focusing every available penny on that card until it is paid off, and then never use it again. Again, per the flowchart, that means using everything left over after steps 0-2 are fulfilled.