Reverse sales tax formula
Pre-tax price = total ÷ (1 + tax rate ÷ 100)
Do not simply subtract 8.75% of the total when reversing an 8.75% tax. Tax was applied to the smaller pre-tax price. The calculated results are rounded to the nearest cent.
Example: $108.75 with 8.75% included tax corresponds to approximately $100 before tax and $8.75 tax.