Billing problems were blamed in a US Sprint firing.

Charles M. Skibo, the former president of US Sprint, was fired because he failed to correct computer problems that caused the company to lose $76 million in its second quarter when customers were incorrectly billed for long-distance calls, sources close to the company said. US Sprint recently sent out 13,000 bills to customers who had already settled their accounts, the sources said. Ed Carter, senior vice president of sales and marketing, said other problems have included under-billing and delayed billing.