Find the amount of the sales tax and the total cost.
Cost of item. Tax rate
$800. 8%
To find the amount of sales tax, you can multiply the cost of the item by the tax rate:
Sales tax = $800 * 8% = 0.08 * $800 = $64
To find the total cost, you can add the cost of the item to the amount of sales tax:
Total cost = Cost of item + Sales tax = $800 + $64 = $864