You may not be able to add fast enough in your head, but that's what calculators are for. Besides, you can think on your feet in other ways. Your excellent memory comes in handy, too. So when you're a bit suspicious about spending your money, go over it once, twice, even three times before reaching for your wallet.
Your birth chart is a map of the sky at the moment you were born. Download the Sun Signs app to find out how the planets’ positions influence your life.