Extract the pre-tax price and tax amount from a total paid in Oregon.
Works back from a tax-inclusive total in Oregon to the pre-tax price and the embedded tax, using the sales-tax rate you enter.
Pre-tax
Pre-tax = total ÷ (1 + rate)
Estimate.
In most U.S. states sticker prices are pre-tax; elsewhere they may be tax-inclusive.
Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.