State tax exemptions, deductions, and credits cost Oklahoma a total of $5.9 billion in revenue each year, according to a report released last week by the Oklahoma Tax Commission.

The commission’s October tax expenditure report said the cost of 166 of the 473 expenditures rose $471 million since the 2008 report.

Expenditures are defined by the commission as legislatively enacted measures that result in revenue that is not ­collected.

The number of expenditures increased by 28 from the last report.

The largest expenditures include $1.7 billion from the sale tax exemption for manufacturers and $1.5 billion from the sales tax exemption on goods purchased for resale.

Itemized and standard state income tax deductions total $733.1 million.

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