If it’s less than $5 it’s basically free. If you return an item for a refund, you’ve made money. If you paid for a vacation months ago, it’s free by the time you go on it. And if you buy something ...

BALTIMORE -- A new personal finance trend has TikTok users recommending humorous new ways to rethink their spending habits. We've all justified unnecessary purchases before, but now social media has ...

You pay for a latte with money from your Starbucks app, so your bank account balance doesn’t change. That means the coffee was basically free, right? This is just one example of “girl math,” a trend ...

From the TikTok feeds that brought you girl dinner comes girl math: a strategy for justifying large or unnecessary purchases. The calculations behind girl math aren't new, but the way we talk about ...

To receive the Vogue Business newsletter, sign up here. Does returning an item mean you have freed up money for spending elsewhere on fashion? Is buying a Prada bag OK if you wear it 670 times at $5 a ...