Add Yahoo as a preferred source to see more of our stories on Google. Being better at math increases income but also ties satisfaction more closely to money. Jonathan Kitchen/Digital Vision via Getty ...

Step aside, “girl dinner” — it’s time for “girl math.” Girl math revolves around justifying your spending habits in creative ways, like subscribing to the idea that if you buy clothes and later return ...

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 ...

If you’ve ever calculated cost per wear to justify the price of an expensive dress, or felt like you’ve made a profit after returning an ill-fitting pair of jeans, you might be an expert in “girl math ...