Subscribe | UPI Odd Newsletter Subscribe PITTSBURGH, Jan. 13 (UPI) -- Pittsburgh Water & Sewer Authority says about 13,000 customers received bills that were off by thousands of dollars due to erroneous decimals. Melissa Rubin, a spokeswoman for the authority, said officials began receiving calls Tuesday morning about bills marked up thousands of dollars from previous months, the Pittsburgh Tribune-Review reported Wednesday. Advertisement Water & Sewer Authority Executive Director Michael Kenney said a technician with the California company that handles the billing, EA Consulting Inc., uploaded the bills to the mailer using a European protocol. Kenney said the European protocol caused commas to appear instead of decimal places and the receiving computer did not recognize the punctuation. He said a bill for $45.00 would show up as $4,500.00 as a result of the error. "The data is all good. It's really nothing more than a bad print file," Kenney said. Officials said corrected bills were mailed out Wednesday and anyone who pays an inflated balance from an incorrect bill will be given a refund.