The total price including sales tax is $29.26 because whenever you are calculating the total cost of a purchase, the formula is going to be: total sale amount = selling price + sales tax.
So, if we use this formula to solve the problem, we have to figure out how much the sales tax adds which is $1.26.
Now, we have to add that amount to the original price.
28 + 1.26 = 29.26
Therefore, the final price (including sales tax) is $29.26.