Original sentence: "  Unauthorized immigrants demand goods and services while an estimated 50 to 75 percent pay taxes.The Congressional Budget Office reported in 2007 that "the tax revenues that unauthorized immigrants generate for state and local governments do not offset the total cost of services provided to them" but "in aggregate and over the long term, tax revenues of all types generated by immigrants—both legal and unauthorized—exceed the cost of the services they use
Edited sentence: The Congressional Budget Office reported in 2007 that "the tax revenues that unauthorized immigrants generate for state and local governments do not offset the total cost of services provided to them"  Unauthorized immigrants demand goods and services while an estimated 50 to 75 percent pay taxes