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math formula for sales tax. The Excel sales tax decalculator works by using a formula that takes the following steps. The cost with tax is 20000 1000 21000.
The companys contribution margin is 50. Sales tax price of item tax rate. So if your tax rate is 07 in decimal form heres the calculation to convert it into a percentage.
The sales tax rate is 4.
Purchase price x sales tax rate sales tax. Sales tax price of item tax rate. For example if the sales tax rate is 6 divide the total amount of receipts by 106. How the sales tax decalculator works.