Zack bought a coat for $69.78 .he paid with a $100 bill and received $26.73 in change. how much was the sales tax? plz ill give 10 points

Iwill give brainliest. give accurate answer, . suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?