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- Move over "girl dinner" and "lazy girl jobs," a new personal finance trend has gone viral on TikTok.
- Called "girl math," this humorous trend has users breaking down purchases into their smallest possible units to justify them.
- One critic says the trend justifies overspending.
A new personal finance trend has TikTok users recommending humorous new ways to rethink their spending habits — like imagining that anything under $5 is free, or measuring the cost of big-ticket items by their cost per wear.