A study by the American Civil Liberties Union of Maine shows that taxpayers are spending tens of thousands of dollars a year to jail low-income offenders for failure to pay fines or make restitution payments. The Portland Press Herald reported that the study shows nearly 10 percent of inmates booked into the Cumberland County Jail between August 2013 and August 2014 were there solely because they missed court-ordered payments. Grainne Dunne, who led the study, said booking records collected from 12 of the state’s 15 county jails mirror statewide the findings in Cumberland County. She said the information had to be compiled by hand from booking records. “We found thousands of people that they booked just on failure to pay fines,” she said. She said that at the 12 jails researchers studied for the one-year period, more than 3,000 inmates were booked for failure to pay fines or make restitution payments.