Accountants and others who spend their days dealing with numbers will enjoy sending these CPA holiday cards to their clients. Nothing is more festive than a bright red calculator that displays the message "Be Merry," with graph paper in the shape of a Christmas tree. Employees, clients and associates are bound to get a chuckle with these clever financially-minded Christmas cards. When you purchase these cards, you'll also be improving the financial picture for your favorite charitable organization. Cards for Causes will automatically donate 20 percent of the cost of each card to the charity of your choice.