An ongoing audit of taxes paid by telephone companies operating in Spokane has turned up $700,000 in unexpected funds for the city, including more than $500,000 in unpaid taxes, interest and penalties from CenturyLink. Along with funds from T-Mobile, the money discovered so far comes from just two companies, and city officials say there’s likely more to come, though they couldn’t predict how much in unpaid tax remains. “That’s a number I can’t even tell you. There’s no way of knowing,” said Tim Dunivant, the city’s budget director, noting that every telephone company operating in Spokane will have its tax bill examined. “All the big ones. Even some of the small ones. Verizon we just completed, and everything was fine.”