The sales tax Carlo needs to pay is P245. Word Problem 2: 2. How much must be paid in total for the items bought in a grocery store in the amount of P12,564 plus the sales tax of 12.8%?- a. What is asked?: The total amount to be paid, including the sales tax.- b. Formula to be used: Total Amount = Price of the items + (Price of the items × Tax Rate)- c. Solution: - Price of the items = P12,564- Tax Rate = 12.8% Total Amount = 12,564 + 12,564 × 0.128 - d.