In order to find the total amount of the shirt including tax, first convert the tax into a decimal: 4.1/100 = 0.041 % Next multiply the cost of the shirt before tax by the tax in decimal form: 25 * 0.041 = 1.025 After that you will add the tax cost and the shirt cost: 25 + 1.025 = 26.025 Finally round to the nearest cent: 26.03 Hope this helps and let me know if you have more questions!