Mira and Gus go to a concert. Mira buys a t-shirt for $30 plus 9% tax. Gus buys a poster for $25 plus 9% tax. Write the difference in the amount that Mira and Gus paid, including tax. Round your answer to the nearest cent.
9% of $30 is $2.70. 9% of $25 is $2.25. Therefore, Mira pays $32.70 and Gus pays $27.25. 32.70-27.25=5.45. The difference in the amount of that Mira and Gus paid is $5.45.
