Given:
Rate of sales tax = 7%
Marked price of an item = $19.94
To find:
The final cost of the item once tax is included.
Solution:
We have,
Rate of sales tax = 7%
Marked price of an item = $19.94


Now, final cost of the item once tax is included is



Therefore, the final cost of the item once tax is included is $21.3358.