Santa Barbara-based call marketing automation software developer Invoca, which is led by Jason Spievak, said yesterday that its systems have converted $2.5 billion in sales for its customers since the company was founded. Invoca said that $1.7 billion of those sales came in the last 12 months. Invoca did not say what that translates to in terms of the company's revenues, however, said it has seed revenue growth of more than 1200 percent over the past three years. Invoca's systems are used for inbound, call marketing automation, click-to-call, and other efforts. Invoca said it now has more than 100 employees.