In addition to monitoring what the state takes in, the department is also required to prepare a report every even-numbered year on how much revenue the state has relinquished by granting various tax exemptions.

If the actual amount lost from particular exemptions can't be determined precisely, the department, comes up with estimates, with varying degrees of reliability.

The most recent report is for 2008, based on 2007 statistics. (Paul L. Dion, chief of the department's office of revenue analysis, said the 2010 report is in its final stages.)

The report said state law, in 2007, carved out 72 sales-tax exemptions. There are the well-known ones, such as food and clothing, and others such as coffins, aircraft parts, mobile homes and newspapers. Dion said more exemptions have been added since the last report; the 2010 report will have around 83.

The best estimate is that those 72 exemptions cost the state $625,575,000 in lost revenue, assuming the transactions were taxed at 7 percent.

And $625,575,000 is 7 percent of $8,936,785,714, the exact number the Chafee campaign cites on its website.  And if you taxed that at 1 percent, it would raise $89,376,857.
   
Dion said the Chafee campaign's calculations are correct. But because many of the report's figures are based on extrapolations, not hard data, real-world results may vary, Dion said. For example, the estimated $125-million cost for exempting food -- items "sold for ingestion or chewing by humans for their taste or nutritional value" -- is derived by updating a 1999 sales-tax model, not actual sales receipts.

"Those are huge numbers," Dion said. "You've got to use caution."

Chafee's sales-tax math is accurate. For that reason, we rate Chafee's projection Mostly True.

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