There are some information that you should first of all note before you calculate tax sales.
• Note that not all states have sales tax.
• Note that sales taxes differ across states for different goods.
• Dig deeper by knowing your city's tax rate and tax laws.
A method to use while calculating sales tax is to calculate total cost. The process is a simple one.
• You can obtain the total sales tax by multiplying the cost of the goods or service by the sales tax. That is; total sales tax = goods or service cost × sales tax.
• The sales tax is usually said in percentage form. So, convert it to decimal form. For example, a 10% tax sales becomes 0.1.
• So, to get the total amount of the product or service, add your obtained total sales tax to the original cost of the product or service.
• If you are good at mathematics, you will know how to obtain any value (sales tax, original cost or product's cost) with the above explanation.