Money is weird, but girl math is magic. Somehow, buying a $70 triple-A game or a $5 indie gem doesn’t count as spending if you squint and do some mental gymnastics. I’m not talking boring budgeting ...

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 ...