Find the amount of the sales tax and the total cost.

Given:
The cost of the item is $700 and the tax rate = 6%.
[tex]\text{Sales tax=}\frac{\text{cost of item}\times tax\text{ rate}}{100}[/tex]Substitute cost of the item = $700 and the tax rate = 6, we get
[tex]\text{Sales tax=}\frac{700\times6}{100}[/tex][tex]\text{Sales tax=}7\times6=42[/tex][tex]\text{Sales tax= \$ 42}[/tex][tex]\text{Total cost =cost of item + sales tax}[/tex]Substitute cost of item=700 and sales tax=42, we get
[tex]\text{Total cost =7}00+42=\text{ \$ 742}[/tex]Hence we get sales tax= $42 and total cost = $ 742.