So Joel wants to buy a new tablet computer from a store having a 20% off sale on all tablets. The tablet he wants has an original cost of $190. He also wants to make sure he has enough money to pay the 5% sales tax. Use this information to answer Questions 6 and 7. And the question says Joel uses the incorrect expression 0.95(190)(0.8) to calculate his total. He finds that the tablet will cost him a total of $144.40. Describe his error and write the correct expression. Please help